Merge branch 'jnnkl-remove-Dom-Loaded-event-blame' into 'master'

Remove obsolete DOMContentLoadedEventListener

See merge request gitlab-org/gitlab!52781

app/assets/javascripts/pages/projects/blame/show/index.js

 import initBlob from '~/pages/projects/init_blob';
 
-document.addEventListener('DOMContentLoaded', initBlob);
+initBlob();