utils: no .metadata deprecations.
utils: no .metadata deprecations.

Otherwise running on old casks can produce deprecations.

Fixes #3738.

reelsense/brew,nandub/brew,vitorgalvao/brew,MikeMcQuaid/brew,Homebrew/brew,DomT4/brew,reitermarkus/brew,claui/brew,claui/brew,JCount/brew,sjackman/homebrew,reitermarkus/brew,nandub/brew,claui/brew,ilovezfs/brew,konqui/brew,ilovezfs/brew,sjackman/homebrew,Linuxbrew/brew,nandub/brew,alyssais/brew,EricFromCanada/brew,sjackman/homebrew,JCount/brew,Homebrew/brew,reelsense/brew,hanxue/linuxbrew,hanxue/linuxbrew,mgrimes/brew,MikeMcQuaid/brew,claui/brew,alyssais/brew,Linuxbrew/brew,maxim-belkin/brew,Homebrew/brew,mahori/brew,Linuxbrew/brew,reelsense/brew,sjackman/homebrew,DomT4/brew,reitermarkus/brew,mahori/brew,JCount/brew,vitorgalvao/brew,hanxue/linuxbrew,vitorgalvao/brew,maxim-belkin/brew,nandub/brew,DomT4/brew,EricFromCanada/brew,EricFromCanada/brew,mahori/brew,konqui/brew,Homebrew/brew,maxim-belkin/brew,vitorgalvao/brew,mgrimes/brew,reitermarkus/brew,Linuxbrew/brew,alyssais/brew,JCount/brew,konqui/brew,EricFromCanada/brew,konqui/brew,DomT4/brew,mahori/brew,ilovezfs/brew,MikeMcQuaid/brew,MikeMcQuaid/brew,mgrimes/brew