Do not attempt to delete the undeletable RNF_ROOT route.
Do not attempt to delete the undeletable RNF_ROOT route.

Discovered & fix tested by Peter J Philip.

ok claudio@ blambert@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars