Remove Travis config for now
Remove Travis config for now

Because of the issues building the native C extension for Xcodeproj,
Travis isn't able to get past bundle install. I'll come back to this
later.

fousa/liftoff,makingspace/liftoff,liftoffcli/liftoff,fhchina/liftoff,IntrepidPursuits/homebrew-liftoff,makingspace/liftoff,liftoffcli/liftoff,fhchina/liftoff,fousa/liftoff,fousa/liftoff,makingspace/liftoff,IntrepidPursuits/homebrew-liftoff,liftoffcli/liftoff,fhchina/liftoff,IntrepidPursuits/homebrew-liftoff