code: def remove_router_from_hosting_device(self, client, hosting_device_id,
                                            router_id):
          
          res_path = hostingdevice.HostingDevice.resource_path
          return client.delete((res_path + DEVICE_L3_ROUTERS + "/%s") % (
              hosting_device_id, router_id))
docs: Remove a router from hosting_device.