Remove RT reference because it is no longer applicable
Remove RT reference because it is no longer applicable

The ticket referred to missing use of nqp::p6bool, which is:
- replaced by nqp::hllbool
- and is used in this piece of code

MasterDuke17/rakudo,nbrown/rakudo,tony-o/rakudo,salortiz/rakudo,tbrowder/rakudo,tony-o/rakudo,MasterDuke17/rakudo,nbrown/rakudo,tony-o/rakudo,salortiz/rakudo,labster/rakudo,tbrowder/rakudo,softmoth/rakudo,MasterDuke17/rakudo,rakudo/rakudo,nbrown/rakudo,tony-o/rakudo,nbrown/rakudo,MasterDuke17/rakudo,softmoth/rakudo,rakudo/rakudo,salortiz/rakudo,rakudo/rakudo,softmoth/rakudo,tony-o/rakudo,labster/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,tony-o/rakudo,labster/rakudo,nbrown/rakudo,tbrowder/rakudo,labster/rakudo,rakudo/rakudo,softmoth/rakudo,salortiz/rakudo,salortiz/rakudo,tbrowder/rakudo,labster/rakudo,salortiz/rakudo,softmoth/rakudo,nbrown/rakudo,rakudo/rakudo,rakudo/rakudo,labster/rakudo