Combine google-{stuff,tooling}

Google-related files should eventually be moved out of GitHub hosting and onto
Google infrastructure (e.g. Git on Borg).

When I do this, I should run:

```fish
> git grep --ignore-case google (git rev-list --all)
```

To assess the reference I've introduced into this repository.

Other tools that should come in handy when I do this are:
- git filter-branch
- BFG repo-cleaner

configs/shared/.emacs.d/init.el

@@ -11,11 +11,9 @@
 (require 'kaomoji)
 
 ;; Google
-(require 'google-tooling)
-;; TODO: How should I handle google-stuff.el?
-
 ;; TODO: Debug why wallpaper is changing randomly.  It seems to happen every 5
 ;; seconds when init.el is open...
+(require 'google-stuff)
 
 ;; Laptop XF-functionality
 (require 'pulse-audio)