[ticket/11230] Update cache driver dock blocks

PHPBB3-12230

phpBB/phpbb/cache/driver/file.php

@@ -758,6 +758,10 @@ class file extends \phpbb\cache\driver\base
 
 	/**
 	* Removes/unlinks file
+	*
+	* @param string $filename Filename to remove
+	* @param bool $check Check file permissions
+	* @return bool True if the file was successfully removed, otherwise false
 	*/
 	function remove_file($filename, $check = false)
 	{