diff --git a/src/IO/File.php b/src/IO/File.php
index aca19c40..a631f071 100644
--- a/src/IO/File.php
+++ b/src/IO/File.php
@@ -10,17 +10,6 @@ use Exception;
  */
 class File
 {
-    /**
-     * @param string $filename
-     * @return FileStream
-     * @throws FileDoesNotExistException
-     * @throws IOException
-     */
-    public static function open(string $filename): FileStream
-    {
-        return new FileStream($filename, FileStream::MODE_READ_WRITE, true);
-    }
-
     /**
      * @param string $filename
      * @param bool   $lock
@@ -28,16 +17,8 @@ class File
      */
     public static function readToEnd(string $filename, bool $lock = false): string
     {
-        $output = '';
-
-        try {
-            $file = new FileStream($filename, FileStream::MODE_READ, $lock);
-            $output = $file->read($file->getLength());
-            $file->close();
-        } catch (Exception $ex) {
-        }
-
-        return $output;
+        $lock = file_get_contents($filename); // reusing $lock bc otherwise sublime yells about unused vars
+        return $lock === false ? $lock : '';
     }
 
     /**
@@ -48,21 +29,7 @@ class File
      */
     public static function writeAll(string $filename, string $data): void
     {
-        $file = new FileStream($filename, FileStream::MODE_TRUNCATE, true);
-        $file->write($data);
-        $file->close();
-    }
-
-    /**
-     * Creates an instance of a temporary file.
-     * @param string $prefix
-     * @return FileStream
-     * @throws FileDoesNotExistException
-     * @throws IOException
-     */
-    public static function temp(string $prefix = 'Misuzu'): FileStream
-    {
-        return static::open(tempnam(sys_get_temp_dir(), $prefix));
+        file_put_contents($filename, $data, LOCK_EX);
     }
 
     /**
@@ -91,4 +58,11 @@ class File
 
         unlink($path);
     }
+
+    public static function safeDelete(string $path): void
+    {
+        if (self::exists($path)) {
+            self::delete($path);
+        }
+    }
 }
diff --git a/src/IO/FileStream.php b/src/IO/FileStream.php
deleted file mode 100644
index 75a935b8..00000000
--- a/src/IO/FileStream.php
+++ /dev/null
@@ -1,372 +0,0 @@
-<?php
-namespace Misuzu\IO;
-
-use ErrorException;
-
-/**
- * Class FileStream
- * @package Misuzu\IO
- */
-class FileStream extends Stream
-{
-    /**
-     * Open a file for reading only.
-     */
-    public const MODE_READ = 0x1;
-
-    /**
-     * Open a file for writing only.
-     */
-    public const MODE_WRITE = 0x2;
-
-    /**
-     * Truncate a file.
-     */
-    private const MODE_TRUNCATE_RAW = 0x4;
-
-    /**
-     * Append to a file.
-     */
-    private const MODE_APPEND_RAW = 0x8;
-
-    /**
-     * Open a file for reading and writing.
-     */
-    public const MODE_READ_WRITE = self::MODE_READ | self::MODE_WRITE;
-
-    /**
-     * Truncate and open a file for writing.
-     */
-    public const MODE_TRUNCATE = self::MODE_TRUNCATE_RAW | self::MODE_WRITE;
-
-    /**
-     * Open a file for writing and append to the end.
-     */
-    public const MODE_APPEND = self::MODE_APPEND_RAW | self::MODE_WRITE;
-
-    protected $fileHandle;
-    protected $filePath;
-    protected $fileMode;
-    protected $isLocked;
-
-    /**
-     * FileStream constructor.
-     * @param string $path
-     * @param int    $mode
-     * @param bool   $lock
-     * @throws FileDoesNotExistException
-     * @throws IOException
-     */
-    public function __construct(string $path, int $mode, bool $lock = true)
-    {
-        $this->isLocked = $lock;
-        $this->filePath = $path;
-        $this->fileMode = $mode;
-
-        try {
-            $this->fileHandle = fopen($this->filePath, static::constructFileMode($this->fileMode));
-        } catch (ErrorException $ex) {
-            throw new FileDoesNotExistException($ex->getMessage());
-        }
-
-        $this->ensureHandleActive();
-
-        if ($this->isLocked) {
-            flock($this->fileHandle, LOCK_EX | LOCK_NB);
-        }
-    }
-
-    /**
-     * Clears up the resources used by this stream.
-     */
-    public function __destruct()
-    {
-        if (!is_resource($this->fileHandle)) {
-            return;
-        }
-
-        $this->close();
-    }
-
-    /**
-     * Creates a file mode string from our own flags.
-     * @param int $mode
-     * @return string
-     * @throws IOException
-     */
-    protected static function constructFileMode(int $mode): string
-    {
-        $mode_read = ($mode & static::MODE_READ) > 0;
-        $mode_write = ($mode & static::MODE_WRITE) > 0;
-        $mode_truncate = ($mode & static::MODE_TRUNCATE_RAW) > 0;
-        $mode_append = ($mode & static::MODE_APPEND_RAW) > 0;
-
-        // why would you ever
-        if ($mode_append && $mode_truncate) {
-            throw new IOException("Can't append and truncate at the same time.");
-        }
-
-        if (($mode_append || $mode_truncate) && !$mode_write) {
-            throw new IOException("Can't append or truncate without write privileges.");
-        }
-
-        $mode_string = '';
-
-        if ($mode_append) {
-            $mode_string = 'a';
-        } elseif ($mode_truncate) {
-            $mode_string = 'w';
-        } elseif ($mode_write) {
-            $mode_string = 'c';
-        }
-
-        $mode_string .= 'b';
-
-        if ($mode_read) {
-            if (strlen($mode_string) < 2) {
-                $mode_string = 'r' . $mode_string;
-            } else {
-                $mode_string .= '+';
-            }
-        }
-
-        // should be at least two characters because of the b flag
-        if (strlen($mode_string) < 2) {
-            throw new IOException('Failed to construct mode???');
-        }
-
-        return $mode_string;
-    }
-
-    /**
-     * @return int
-     * @throws IOException
-     */
-    public function getResource(): int
-    {
-        $this->ensureHandleActive();
-        return $this->fileHandle;
-    }
-
-    /**
-     * @throws IOException
-     */
-    protected function ensureHandleActive(): void
-    {
-        if (!is_resource($this->fileHandle)) {
-            throw new IOException("No active file handle.");
-        }
-    }
-
-    /**
-     * @throws IOException
-     */
-    protected function ensureCanRead(): void
-    {
-        if (!$this->getCanRead()) {
-            throw new IOException('This stream cannot perform read operations.');
-        }
-    }
-
-    /**
-     * @throws IOException
-     */
-    protected function ensureCanWrite(): void
-    {
-        if (!$this->getCanWrite()) {
-            throw new IOException('This stream cannot perform write operations.');
-        }
-    }
-
-    /**
-     * @throws IOException
-     */
-    protected function ensureCanSeek(): void
-    {
-        if (!$this->getCanSeek()) {
-            throw new IOException('This stream cannot perform seek operations.');
-        }
-    }
-
-    /**
-     * @return bool
-     */
-    public function getCanRead(): bool
-    {
-        return ($this->fileMode & static::MODE_READ) > 0 && is_readable($this->filePath);
-    }
-
-    /**
-     * @return bool
-     */
-    public function getCanSeek(): bool
-    {
-        return ($this->fileMode & static::MODE_APPEND_RAW) == 0 && $this->getCanRead();
-    }
-
-    /**
-     * @return bool
-     */
-    public function getCanTimeout(): bool
-    {
-        return false;
-    }
-
-    /**
-     * @return bool
-     */
-    public function getCanWrite(): bool
-    {
-        return ($this->fileMode & static::MODE_WRITE) > 0 && is_writable($this->filePath);
-    }
-
-    /**
-     * @return int
-     * @throws IOException
-     */
-    public function getLength(): int
-    {
-        $this->ensureHandleActive();
-        return fstat($this->fileHandle)['size'];
-    }
-
-    /**
-     * @return int
-     * @throws IOException
-     */
-    public function getPosition(): int
-    {
-        $this->ensureHandleActive();
-        return ftell($this->fileHandle);
-    }
-
-    /**
-     * @return int
-     */
-    public function getReadTimeout(): int
-    {
-        return -1;
-    }
-
-    /**
-     * @return int
-     */
-    public function getWriteTimeout(): int
-    {
-        return -1;
-    }
-
-    /**
-     * @throws IOException
-     */
-    public function flush(): void
-    {
-        $this->ensureHandleActive();
-        fflush($this->fileHandle);
-    }
-
-    /**
-     * @throws IOException
-     */
-    public function close(): void
-    {
-        $this->ensureHandleActive();
-
-        if ($this->isLocked) {
-            flock($this->fileHandle, LOCK_UN | LOCK_NB);
-        }
-
-        fclose($this->fileHandle);
-    }
-
-    /**
-     * @param int $length
-     * @return string
-     * @throws IOException
-     */
-    public function read(int $length): string
-    {
-        $this->ensureHandleActive();
-        $this->ensureCanRead();
-
-        $read = fread($this->fileHandle, $length);
-
-        if ($read === false) {
-            throw new IOException('Read failed.');
-        }
-
-        return $read;
-    }
-
-    /**
-     * @return int
-     * @throws IOException
-     */
-    public function readChar(): int
-    {
-        $this->ensureHandleActive();
-        $this->ensureCanRead();
-
-        return ord(fgetc($this->fileHandle));
-    }
-
-    /**
-     * @param string $data
-     * @return int
-     * @throws IOException
-     */
-    public function write(string $data): int
-    {
-        $this->ensureHandleActive();
-        $this->ensureCanWrite();
-
-        $write = fwrite($this->fileHandle, $data);
-
-        if ($write === false) {
-            throw new IOException('Write failed.');
-        }
-
-        return $write;
-    }
-
-    /**
-     * @param int $char
-     * @throws IOException
-     */
-    public function writeChar(int $char): void
-    {
-        $this->write(chr($char));
-    }
-
-    /**
-     * @param int $offset
-     * @param int $origin
-     * @throws IOException
-     */
-    public function seek(int $offset, int $origin): void
-    {
-        $this->ensureHandleActive();
-        $this->ensureCanSeek();
-
-        switch ($origin) {
-            case Stream::ORIGIN_BEGIN:
-                $origin = SEEK_SET;
-                break;
-
-            case Stream::ORIGIN_END:
-                $origin = SEEK_END;
-                break;
-
-            case Stream::ORIGIN_CURRENT:
-                $origin = SEEK_CUR;
-                break;
-
-            default:
-                throw new IOException('Invalid seek origin.');
-        }
-
-        if (fseek($this->fileHandle, $offset, $origin) !== 0) {
-            throw new IOException('Seek operation failed.');
-        }
-    }
-}
diff --git a/src/IO/NetworkStream.php b/src/IO/NetworkStream.php
deleted file mode 100644
index 3a311d32..00000000
--- a/src/IO/NetworkStream.php
+++ /dev/null
@@ -1,221 +0,0 @@
-<?php
-namespace Misuzu\IO;
-
-/**
- * Provides a wrapper for fsockopen.
- * Class NetworkStream
- * @package Misuzu\IO
- */
-class NetworkStream extends Stream
-{
-    protected $resourceHandle;
-    protected $host;
-    protected $port;
-    protected $timeout;
-
-    /**
-     * NetworkStream constructor.
-     * @param string   $host
-     * @param int      $port
-     * @param int|null $timeout
-     * @throws IOException
-     */
-    public function __construct(string $host, int $port = -1, ?int $timeout = null)
-    {
-        $this->host = $host;
-        $this->port = $port;
-        $this->timeout = $timeout ?? (int)ini_get('default_socket_timeout');
-
-        try {
-            $this->resourceHandle = fsockopen($this->host, $this->port, $errno, $errstr, $this->timeout);
-        } catch (ErrorException $ex) {
-            throw new IOException($ex->getMessage());
-        }
-
-        if ($this->resourceHandle === false) {
-            throw new IOException("[{$errno}] {$errstr}");
-        }
-
-        $this->ensureHandleActive();
-    }
-
-    /**
-     * Cleans the resources used by this object up.
-     */
-    public function __destruct()
-    {
-        if (!is_resource($this->resourceHandle)) {
-            return;
-        }
-
-        $this->close();
-    }
-
-    /**
-     * @return resource
-     * @throws IOException
-     */
-    public function getResource(): resource
-    {
-        $this->ensureHandleActive();
-        return $this->resourceHandle;
-    }
-
-    /**
-     * @throws IOException
-     */
-    protected function ensureHandleActive(): void
-    {
-        if (!is_resource($this->resourceHandle)) {
-            throw new IOException("No active file handle.");
-        }
-    }
-
-    /**
-     * @return bool
-     */
-    public function getCanRead(): bool
-    {
-        return true;
-    }
-
-    /**
-     * @return bool
-     */
-    public function getCanSeek(): bool
-    {
-        return false;
-    }
-
-    /**
-     * @return bool
-     */
-    public function getCanTimeout(): bool
-    {
-        return true;
-    }
-
-    /**
-     * @return bool
-     */
-    public function getCanWrite(): bool
-    {
-        return true;
-    }
-
-    /**
-     * @return int
-     */
-    public function getLength(): int
-    {
-        return -1;
-    }
-
-    /**
-     * @return int
-     */
-    public function getPosition(): int
-    {
-        return -1;
-    }
-
-    /**
-     * @return int
-     */
-    public function getReadTimeout(): int
-    {
-        return -1;
-    }
-
-    /**
-     * @return int
-     */
-    public function getWriteTimeout(): int
-    {
-        return -1;
-    }
-
-    /**
-     * @throws IOException
-     */
-    public function flush(): void
-    {
-        $this->ensureHandleActive();
-        fflush($this->resourceHandle);
-    }
-
-    /**
-     * @throws IOException
-     */
-    public function close(): void
-    {
-        $this->ensureHandleActive();
-        fclose($this->resourceHandle);
-    }
-
-    /**
-     * @param int $length
-     * @return string
-     * @throws IOException
-     */
-    public function read(int $length): string
-    {
-        $this->ensureHandleActive();
-
-        $read = fread($this->resourceHandle, $length);
-
-        if ($read === false) {
-            throw new IOException('Read failed.');
-        }
-
-        return $read;
-    }
-
-    /**
-     * @return int
-     * @throws IOException
-     */
-    public function readChar(): int
-    {
-        $this->ensureHandleActive();
-        return ord(fgetc($this->resourceHandle));
-    }
-
-    /**
-     * @param string $data
-     * @return int
-     * @throws IOException
-     */
-    public function write(string $data): int
-    {
-        $this->ensureHandleActive();
-
-        $write = fwrite($this->resourceHandle, $data);
-
-        if ($write === false) {
-            throw new IOException('Write failed.');
-        }
-
-        return $write;
-    }
-
-    /**
-     * @param int $char
-     * @throws IOException
-     */
-    public function writeChar(int $char): void
-    {
-        $this->write(chr($char), 0, 1);
-    }
-
-    /**
-     * @param int $offset
-     * @param int $origin
-     * @throws IOException
-     * @SuppressWarnings("unused")
-     */
-    public function seek(int $offset, int $origin): void
-    {
-        throw new IOException('This stream cannot perform seek operations.');
-    }
-}
diff --git a/src/IO/Stream.php b/src/IO/Stream.php
deleted file mode 100644
index 1b3f00cd..00000000
--- a/src/IO/Stream.php
+++ /dev/null
@@ -1,53 +0,0 @@
-<?php
-namespace Misuzu\IO;
-
-use InvalidArgumentException;
-
-/**
- * Class Stream
- * @package Misuzu\IO
- * @property-read bool $canRead
- * @property-read bool $canSeek
- * @property-read bool $canTimeout
- * @property-read bool $canWrite
- * @property-read int $length
- * @property-read int $position
- * @property-read int $readTimeout
- * @property-read int $writeTimeout
- */
-abstract class Stream
-{
-    public const ORIGIN_CURRENT = 0;
-    public const ORIGIN_BEGIN = 1;
-    public const ORIGIN_END = 2;
-
-    public function __get(string $name)
-    {
-        $name = 'get' . ucfirst($name);
-
-        if (method_exists(static::class, $name)) {
-            return $this->{$name}();
-        }
-
-        throw new InvalidArgumentException;
-    }
-
-    abstract public function getCanRead(): bool;
-    abstract public function getCanSeek(): bool;
-    abstract public function getCanTimeout(): bool;
-    abstract public function getCanWrite(): bool;
-    abstract public function getLength(): int;
-    abstract public function getPosition(): int;
-    abstract public function getReadTimeout(): int;
-    abstract public function getWriteTimeout(): int;
-
-    abstract public function flush(): void;
-    abstract public function close(): void;
-    abstract public function seek(int $offset, int $origin): void;
-
-    abstract public function read(int $length): string;
-    abstract public function readChar(): int;
-
-    abstract public function write(string $data): int;
-    abstract public function writeChar(int $char): void;
-}
diff --git a/src/Users/user.php b/src/Users/user.php
index dd168104..9a5afb57 100644
--- a/src/Users/user.php
+++ b/src/Users/user.php
@@ -68,9 +68,7 @@ function user_avatar_delete(int $userId): void
     ];
 
     foreach ($deleteThis as $deleteAvatar) {
-        if (File::exists($deleteAvatar)) {
-            File::delete($deleteAvatar);
-        }
+        File::safeDelete($deleteAvatar);
     }
 }
 
diff --git a/tests/FileSystemTest.php b/tests/FileSystemTest.php
deleted file mode 100644
index 6c0d2b4e..00000000
--- a/tests/FileSystemTest.php
+++ /dev/null
@@ -1,129 +0,0 @@
-<?php
-namespace MisuzuTests;
-
-use PHPUnit\Framework\TestCase;
-use Misuzu\IO\Directory;
-use Misuzu\IO\File;
-use Misuzu\IO\FileStream;
-
-class FileSystemTest extends TestCase
-{
-    protected $workingDirectory;
-
-    protected function setUp()
-    {
-        $this->workingDirectory = sys_get_temp_dir() . '/MisuzuFileSystemTest' . time();
-    }
-
-    public function testSlashFix()
-    {
-        $right_slash = DIRECTORY_SEPARATOR;
-        $wrong_slash = DIRECTORY_SEPARATOR == '/' ? '\\' : '/';
-
-        $this->assertEquals(
-            Directory::fixSlashes("test{$wrong_slash}dir{$wrong_slash}with{$wrong_slash}wrong{$wrong_slash}slashes"),
-            "test{$right_slash}dir{$right_slash}with{$right_slash}wrong{$right_slash}slashes"
-        );
-    }
-
-    public function testExists()
-    {
-        $this->assertTrue(Directory::exists(sys_get_temp_dir()));
-        $this->assertFalse(Directory::exists($this->workingDirectory));
-    }
-
-    public function testCreateDir()
-    {
-        $directory = Directory::create($this->workingDirectory);
-        $this->assertInstanceOf(Directory::class, $directory);
-    }
-
-    public function testCreateFile()
-    {
-        $file = File::open($this->workingDirectory . '/file');
-        $this->assertInstanceOf(FileStream::class, $file);
-        $file->close();
-    }
-
-    public function testWriteFile()
-    {
-        $file = new FileStream($this->workingDirectory . '/file', FileStream::MODE_TRUNCATE);
-        $this->assertInstanceOf(FileStream::class, $file);
-
-        $file->write('mis');
-        $file->write('uzu');
-        $this->assertEquals(6, $file->length);
-
-        $file->close();
-    }
-
-    public function testAppendFile()
-    {
-        $file = new FileStream($this->workingDirectory . '/file', FileStream::MODE_APPEND);
-        $this->assertInstanceOf(FileStream::class, $file);
-
-        $file->write(' test');
-        $this->assertEquals(11, $file->length);
-
-        $file->close();
-    }
-
-    public function testPosition()
-    {
-        $file = new FileStream($this->workingDirectory . '/file', FileStream::MODE_READ);
-        $this->assertInstanceOf(FileStream::class, $file);
-
-        $file->seek(0, FileStream::ORIGIN_BEGIN);
-        $this->assertEquals(0, $file->position);
-
-        $file->seek(0, FileStream::ORIGIN_END);
-        $this->assertEquals($file->length, $file->position);
-
-        $file->seek(4, FileStream::ORIGIN_BEGIN);
-        $this->assertEquals(4, $file->position);
-
-        $file->seek(4, FileStream::ORIGIN_CURRENT);
-        $this->assertEquals(8, $file->position);
-
-        $file->close();
-    }
-
-    public function testRead()
-    {
-        $file = new FileStream($this->workingDirectory . '/file', FileStream::MODE_READ);
-        $this->assertInstanceOf(FileStream::class, $file);
-
-        $this->assertEquals('misuzu test', $file->read($file->length));
-
-        $file->seek(7, FileStream::ORIGIN_BEGIN);
-        $this->assertEquals('test', $file->read(4));
-
-        $file->close();
-    }
-
-    public function testChar()
-    {
-        $file = new FileStream($this->workingDirectory . '/file', FileStream::MODE_READ);
-        $this->assertInstanceOf(FileStream::class, $file);
-
-        $file->seek(3, FileStream::ORIGIN_BEGIN);
-        $this->assertEquals(ord('u'), $file->readChar());
-
-        $file->close();
-    }
-
-    public function testDirectoryFiles()
-    {
-        $dir = new Directory($this->workingDirectory);
-        $this->assertEquals([realpath($this->workingDirectory . DIRECTORY_SEPARATOR . 'file')], $dir->files());
-    }
-
-    public function testDelete()
-    {
-        File::delete($this->workingDirectory . '/file');
-        $this->assertFalse(File::exists($this->workingDirectory . '/file'));
-
-        Directory::delete($this->workingDirectory);
-        $this->assertFalse(Directory::exists($this->workingDirectory));
-    }
-}