Remove unused import

tests/yii

@@ -8,7 +8,7 @@ use Yiisoft\Queue\Message\JsonMessageSerializer;
 use Yiisoft\Test\Support\Container\SimpleContainer;
 use Yiisoft\Yii\Console\Application;
 use Yiisoft\Queue\AMQP\Adapter;
-use Yiisoft\Queue\AMQP\MessageSerializer;
+
 use Yiisoft\Queue\AMQP\QueueProvider;
 use Yiisoft\Queue\AMQP\Settings\Queue as QueueSettings;
 use Yiisoft\Queue\AMQP\Tests\Support\FileHelper;