magento/community-features#9: Eliminate the need for inheritance for action controllers

- code style fixes

Author: lenaorobei

dev/tests/integration/testsuite/Magento/PageBuilder/Controller/Adminhtml/ContentType/Image/UploadTest.php

@@ -18,9 +18,6 @@
 use PHPUnit\Framework\MockObject\MockObject;
 use PHPUnit\Framework\TestCase;
 
-/**
- * Class UploadTest
- */
 class UploadTest extends TestCase
 {
     /**
@@ -119,7 +116,6 @@ public function testFileValidationFailsWhenFileHasCorrectExtensionButInvalidMime
         $this->setFilesGlobalMock($invalid_file_pathname);
         $this->setUploaderMockForField('background_image');
 
-
         $this->resultJson->expects($this->once())->method('setData')->willReturnCallback(function ($result) {
             $this->assertEquals([
                 'error' => 'File validation failed.',