Fix Copyright.

Author: admanesachin

dev/tests/api-functional/framework/Magento/TestFramework/Authentication/Rest/OauthClient.php

@@ -1,10 +1,9 @@
 <?php
 /**
- * oAuth client for Magento REST API.
- *
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+
 namespace Magento\TestFramework\Authentication\Rest;
 
 use Magento\TestFramework\Helper\Bootstrap;