caskroom/homebrew-cask — pull request #7529 by rolandwalker (2014-11-22 15:36:00+00:00)
Title: Remove automatic tap migration code and docs

Anyone who has run *any* `brew cask` command since April got migrated automatically.

In the unlikely event anyone has such an old installation which did not migrate, the advice should be to untap/re-tap or uninstall/re-install if needed.