utils: remove bad symlink if it already exists.
utils: remove bad symlink if it already exists.

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