Fixed coding standard vioalitions. Removed ignoring file from head of the file.

Author: dverkade

lib/internal/Magento/Framework/ObjectManager/Code/Generator/Persistor.php

@@ -4,8 +4,6 @@
  * See COPYING.txt for license details.
  */
 
-// @codingStandardsIgnoreFile
-
 namespace Magento\Framework\ObjectManager\Code\Generator;
 
 /**

lib/internal/Magento/Framework/ObjectManager/Code/Generator/Repository.php

@@ -4,8 +4,6 @@
  * See COPYING.txt for license details.
  */
 
-// @codingStandardsIgnoreFile
-
 namespace Magento\Framework\ObjectManager\Code\Generator;
 
 use Magento\Framework\Api\ExtensionAttribute\JoinProcessorInterface;

lib/internal/Magento/Framework/ObjectManager/Test/Unit/Relations/RuntimeTest.php

@@ -4,8 +4,6 @@
  * See COPYING.txt for license details.
  */
 
-// @codingStandardsIgnoreFile
-
 namespace Magento\Framework\ObjectManager\Test\Unit\Relations;
 
 require_once __DIR__ . '/../_files/Child.php';