Merge pull request #16990 from ckeditor/cc/6588

Internal: Code refactoring.

docs/_snippets/features/keyboard-support.js

@@ -3,7 +3,7 @@
  * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  */
 
-/* globals window, document, open, console, LICENSE_KEY */
+/* globals window, document, console, LICENSE_KEY */
 
 // Keep the guide listing updated with each change.
 
@@ -59,15 +59,9 @@ import { Template } from '@ckeditor/ckeditor5-template';
 import { TextTransformation } from '@ckeditor/ckeditor5-typing';
 import WProofreader from '@webspellchecker/wproofreader-ckeditor5/src/wproofreader.js';
 
-// Additional protection for internal license keys CF#2555.
-window.open.closed = 1;
-
 // import { CS_CONFIG } from '@ckeditor/ckeditor5-cloud-services/tests/_utils/cloud-services-config';
 import { TOKEN_URL } from '@ckeditor/ckeditor5-ckbox/tests/_utils/ckbox-config.js';
 
-// Allow using internal license keys in this sample. See CF#2555.
-open.closed = 1;
-
 // Templates icons.
 import articleImageRightIcon from '../../assets/img/article-image-right.svg';
 import financialReportIcon from '../../assets/img/financial-report.svg';