Move brewfile to extra configs

These are not settings that get carried over to more than a couple of
machines, and while linux homebrew exists, there is very little reason
to use it instead of existing package managers.

homebrew/brewfile

@@ -1,48 +0,0 @@
-# Command line utilities
-brew 'ansible'
-brew 'bchunk'
-brew 'git'
-brew 'neovim', args: ['HEAD']
-brew 'openssl'
-brew 'pandoc'
-brew 'pandoc-citeproc'
-brew 'testdisk'
-brew 'the_silver_searcher'
-brew 'tmux'
-brew 'tree'
-brew 'wget'
-
-# Application management through brew-casks
-tap 'caskroom/cask'
-brew 'brew-cask'
-cask 'anki'
-cask 'bettertouchtool'
-cask 'boxer'
-cask 'calibre'
-cask 'cord'
-cask 'dropbox'
-cask 'flux'
-cask 'filezilla'
-cask 'firefox'
-cask 'gfxcardstatus'
-cask 'google-chrome'
-cask 'grandperspective'
-cask 'handbrake'
-cask 'iterm2'
-cask 'karabiner'
-cask 'kindle'
-cask 'macpass'
-cask 'menumeters'
-cask 'pdfsam-basic'
-cask 'quicksilver'
-cask 'skype'
-cask 'smcfancontrol'
-cask 'smoothmouse'
-cask 'steam'
-cask 'teamviewer'
-cask 'transmission'
-cask 'tunnelblick'
-cask 'vagrant'
-cask 'virtualbox'
-cask 'vlc'
-cask 'xld'