brew: remove unnecessary cask command for alfred support
brew: remove unnecessary cask command for alfred support

Alfred provides out of the box support now:
==> Great news!
==> As of v2.6, Alfred now has first-class support for Casks out of the box!
==> So theres no more need for `brew cask alfred`. Go upgrade your Alfred!

bronxct1/dotfiles,codfish/dotfiles,bronxct1/dotfiles,pmacom/dotfiles,codfish/dotfiles