Remove check for chmod in File::delete()

Author: Hackwar

src/File.php

@@ -159,10 +159,6 @@ public static function delete($file)
             $file     = Path::clean($file);
             $filename = basename($file);
 
-            if (!Path::canChmod($file)) {
-                throw new FilesystemException(__METHOD__ . ': Failed deleting inaccessible file ' . $filename);
-            }
-
             // Try making the file writable first. If it's read-only, it can't be deleted
             // on Windows, even if the parent folder is writable
             @chmod($file, 0777);