def deltunnel(self, n1num, n2num):
        key = self.tunnelkey(n1num, n2num)
        try:
            gt = self.tunnels.pop(key)
        except KeyError:
            gt = None
        if gt:
            self.session.delobj(gt.objid)
            del gt
Cleanup of the GreTapBridge.
dataset/ETHPy150Open coreemu/core/daemon/core/broker.py/CoreBroker.deltunnel