remove flaky cask upgrade test
remove flaky cask upgrade test

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