removed obsolete test

src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MongoDbSessionHandlerTest.php

@@ -233,30 +233,6 @@ class MongoDbSessionHandlerTest extends \PHPUnit_Framework_TestCase
         $this->assertTrue($this->storage->gc(1));
     }
 
-    public function testGcWhenUsingExpiresField()
-    {
-        $this->options = array(
-            'id_field' => '_id',
-            'data_field' => 'data',
-            'time_field' => 'time',
-            'database' => 'sf2-test',
-            'collection' => 'session-test',
-            'expiry_field' => 'expiresAt',
-        );
-
-        $this->storage = new MongoDbSessionHandler($this->mongo, $this->options);
-
-        $collection = $this->createMongoCollectionMock();
-
-        $this->mongo->expects($this->never())
-            ->method('selectCollection');
-
-        $collection->expects($this->never())
-            ->method('remove');
-
-        $this->assertTrue($this->storage->gc(1));
-    }
-
     public function testGetConnection()
     {
         $method = new \ReflectionMethod($this->storage, 'getMongo');