workflows/tests: remove cask taps audit.
workflows/tests: remove cask taps audit.

These are just too error-prone. They shouldn't be re-enabled until our
CI is setup such that it's impossible for any changes to be merged into
homebrew-cask if these are failing.

EricFromCanada/brew,sjackman/homebrew,nandub/brew,JCount/brew,claui/brew,JCount/brew,sjackman/homebrew,Homebrew/brew,JCount/brew,claui/brew,sjackman/homebrew,claui/brew,EricFromCanada/brew,claui/brew,Homebrew/brew,MikeMcQuaid/brew,vitorgalvao/brew,MikeMcQuaid/brew,EricFromCanada/brew,nandub/brew,nandub/brew,nandub/brew,sjackman/homebrew,MikeMcQuaid/brew,vitorgalvao/brew,vitorgalvao/brew,Homebrew/brew,vitorgalvao/brew,MikeMcQuaid/brew,Homebrew/brew,EricFromCanada/brew,JCount/brew