Fix issues with roast checkout
Fix issues with roast checkout

Unsure what the original purpose of setting the push_url stuff was
about, but on any clean checkout I always have to change origin URLs,
if I want to push anything, as it gives errors about push access.

Fix by not messing with anything and just checking out over HTTPs.

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