Remove remaining deprecated contributed commands.

Library/Contributions/cmd/brew-beer.rb

Library/Contributions/cmd/brew-bundle-dir.rb

Library/Contributions/cmd/brew-bundle.rb

Library/Contributions/cmd/brew-graph

Library/Contributions/cmd/brew-profile.rb

Library/Contributions/cmd/brew-server

Library/Contributions/cmd/brew-services.rb

Library/Contributions/cmd/brew-versions.rb

Library/Contributions/cmd/brew-which.rb

Library/Contributions/cmd/public/bootstrap.min.css

...y/Contributions/cmd/public/glyphicons-halflings-white.png

Library/Contributions/cmd/public/glyphicons-halflings.png