config: don't show HOMEBREW_DISPLAY.
config: don't show HOMEBREW_DISPLAY.

This is set by XQuartz and not needed information for us.

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