[Validator] Removed unused class GroupChain

src/Symfony/Component/Validator/GroupChain.php

@@ -1,46 +0,0 @@
-<?php
-
-/*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Symfony\Component\Validator;
-
-use Symfony\Component\Validator\Mapping\ClassMetadata;
-
-class GroupChain
-{
-    protected $groups = array();
-    protected $groupSequences = array();
-
-    public function addGroup($group)
-    {
-        $this->groups[$group] = $group;
-    }
-
-    public function addGroupSequence(array $groups)
-    {
-        if (count($groups) == 0) {
-            throw new \InvalidArgumentException('A group sequence must contain at least one group');
-        }
-
-        if (!in_array($groups, $this->groupSequences, true)) {
-            $this->groupSequences[] = $groups;
-        }
-    }
-
-    public function getGroups()
-    {
-        return $this->groups;
-    }
-
-    public function getGroupSequences()
-    {
-        return $this->groupSequences;
-    }
-}