Merge branch 'jnnkl-DOMContentLoadedEventListener-new-labels' into 'master'

Remove obsolete DOMContentLoaded EventListener

See merge request gitlab-org/gitlab!51462

app/assets/javascripts/pages/projects/labels/new/index.js

 import Labels from 'ee_else_ce/labels';
 
-document.addEventListener('DOMContentLoaded', () => new Labels());
+// eslint-disable-next-line no-new
+new Labels();