[HttpKernel] removed unused class

src/Symfony/Component/HttpKernel/Debug/ErrorException.php

@@ -1,21 +0,0 @@
-<?php
-
-/*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Symfony\Component\HttpKernel\Debug;
-
-/**
- * ErrorException.
- *
- * @author Fabien Potencier <fabien@symfony.com>
- */
-class ErrorException extends \Exception
-{
-}