Revert "My first commit of codes"

This reverts commit a6e5a69348.

vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/Session/SessionBagInterface.php

@@ -1,48 +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\HttpFoundation\Session;
-
-/**
- * Session Bag store.
- *
- * @author Drak <drak@zikula.org>
- */
-interface SessionBagInterface
-{
-    /**
-     * Gets this bag's name.
-     *
-     * @return string
-     */
-    public function getName();
-
-    /**
-     * Initializes the Bag.
-     *
-     * @param array $array
-     */
-    public function initialize(array &$array);
-
-    /**
-     * Gets the storage key for this bag.
-     *
-     * @return string
-     */
-    public function getStorageKey();
-
-    /**
-     * Clears out data from bag.
-     *
-     * @return mixed Whatever data was contained.
-     */
-    public function clear();
-}