This command would no-op if used in major modes with "fake" comments.
i.e. modes where "comments" are merely highlighted as comments, but have
no comment entry in its syntax table. e.g. text-mode + git-commit-mode.
- Code reduction and refactor across the board (cull unneeded minor
advise, hooks and hacks or update them)
- Revise outdated comments and docstrings
- Reorganize core autoload libraries
- Remove large file check (Emacs already has a built-in one, which we
augment to be even more performant when it does kick in)
- helpful.el can now be disabled completely through package!
