fix test

Author: nicolas-grekas

Tests/Store/RedisProxyStoreFactoryTest.php

@@ -17,16 +17,12 @@
 use Symfony\Component\Lock\Store\StoreFactory;
 
 /**
- * @author Alexandre Daubois <alex.daubois@gmail.com>
+ * @requires extension redis
  */
 class RedisProxyStoreFactoryTest extends TestCase
 {
     public function testCreateStore()
     {
-        if (!class_exists(RedisProxy::class)) {
-            $this->markTestSkipped();
-        }
-
         $store = StoreFactory::createStore($this->createMock(RedisProxy::class));
 
         $this->assertInstanceOf(RedisStore::class, $store);