General refactor of Doom core

- 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- Revise outdated comments and docstrings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!

core/autoload/cli.el

@@ -43,24 +43,3 @@
   "TODO"
   (interactive "P")
   (doom--run "refresh" yes))
-
-;;;###autoload
-(defun doom/reload (&optional force-p)
-  "Reloads your config. This is experimental!
-
-If called from a noninteractive session, this will try to communicate with a
-live server (if one is found) to tell it to run this function.
-
-If called from an interactive session, tries to reload autoloads files (if
-necessary), reinistalize doom (via `doom-initialize') and reloads your private
-init.el and config.el. Then runs `doom-reload-hook'."
-  (interactive "P")
-  (require 'core-cli)
-  (doom-reload-autoloads force-p)
-  (setq load-path doom-site-load-path)
-  (let (doom-init-p)
-    (doom-initialize))
-  (with-demoted-errors "PRIVATE CONFIG ERROR: %s"
-    (doom-initialize-modules 'force))
-  (run-hook-wrapped 'doom-reload-hook #'doom-try-run-hook)
-  (message "Finished!"))