code: def delete_virtualip(self, loadbalancer, vip):
          
          lb = vip.parent
          if not lb:
              raise exc.UnattachedVirtualIP("No parent Load Balancer for this "
                      "VirtualIP could be determined.")
          resp, body = self.api.method_delete("/loadbalancers/%s/virtualips/%s" %
                  (lb.id, vip.id))
          return resp, body
docs: Deletes the VirtualIP from its load balancer.