uninstall: stop assuming kegs always map to formulae
uninstall: stop assuming kegs always map to formulae

gordonmcshane/homebrew,AnastasiaSulyagina/brew,nandub/brew,alyssais/brew,gordonmcshane/homebrew,EricFromCanada/brew,hanxue/linuxbrew,muellermartin/dist,EricFromCanada/brew,staticfloat/brew,gregory-nisbet/brew,konqui/brew,reitermarkus/brew,EricFromCanada/brew,aw1621107/brew,maxim-belkin/brew,claui/brew,sjackman/homebrew,AnastasiaSulyagina/brew,DomT4/brew,Homebrew/brew,DomT4/brew,zmwangx/brew,muellermartin/dist,sjackman/homebrew,JCount/brew,JCount/brew,mgrimes/brew,tonyg/homebrew,nandub/brew,mahori/brew,toonetown/homebrew,vitorgalvao/brew,ilovezfs/brew,ilovezfs/brew,DomT4/brew,Homebrew/brew,pseudocody/brew,reelsense/brew,sjackman/homebrew,mahori/brew,amar-laksh/brew_sudo,konqui/brew,MikeMcQuaid/brew,maxim-belkin/brew,Homebrew/brew,palxex/brew,amar-laksh/brew_sudo,nandub/brew,hanxue/linuxbrew,konqui/brew,mistydemeo/homebrew,Linuxbrew/brew,MikeMcQuaid/brew,EricFromCanada/brew,jmsundar/brew,konqui/brew,rwhogg/brew,nandub/brew,gregory-nisbet/brew,zmwangx/brew,bfontaine/brew,ilovezfs/brew,bfontaine/brew,maxim-belkin/brew,claui/brew,Linuxbrew/brew,aw1621107/brew,claui/brew,alyssais/brew,rwhogg/brew,JCount/brew,Linuxbrew/brew,vitorgalvao/brew,gordonmcshane/homebrew,MikeMcQuaid/brew,vitorgalvao/brew,toonetown/homebrew,reitermarkus/brew,jmsundar/brew,amar-laksh/brew_sudo,tonyg/homebrew,mgrimes/brew,DomT4/brew,vitorgalvao/brew,reelsense/brew,reitermarkus/brew,claui/brew,alyssais/brew,mahori/brew,reitermarkus/brew,hanxue/linuxbrew,jmsundar/brew,mahori/brew,toonetown/homebrew,rwhogg/brew,tonyg/homebrew,reelsense/brew,pseudocody/brew,muellermartin/dist,mistydemeo/homebrew,mistydemeo/homebrew,palxex/brew,gregory-nisbet/brew,zmwangx/brew,Homebrew/brew,JCount/brew,pseudocody/brew,AnastasiaSulyagina/brew,staticfloat/brew,aw1621107/brew,mgrimes/brew,MikeMcQuaid/brew,staticfloat/brew,palxex/brew,sjackman/homebrew,bfontaine/brew,Linuxbrew/brew