Remove IIFE's in diff_notes_bundle.js
This MR removes unnecessary IIFEs from files used in diff_notes_bundle.js
EE Port: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1672
This MR removes unnecessary IIFEs from files used in diff_notes_bundle.js
EE Port: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1672