THe GOPe won’t have to take down Cruz, the DNC will do that for them by suing him in federal court the day after he would become the nominee. They would find a federal judge who would agree the NBC issue is a serious one and chaos would ensue. Getting rid of Cruz is the easiest part, then the GOPe would have to reconvene and pick Jeb! or someone in his place. If the present rules don’t cover this, rest assured they will make up new rules that will.
Just because Trumpers wear silly little tin foil birther hats doesn’t mean everyone does.