worldguard.region.remove.own.* (lets owners remove their own regions)
worldguard.region.remove.own.<region> (lets owners remove their own regions for the given region ID)
worldguard.region.remove.member.* (lets members remove their own regions)
worldguard.region.remove.member.<region> (lets members remove their own regions for the given region ID)
worldguard.region.remove.*
worldguard.region.remove.<region> (for a given region)