Unused params in VNFFGNoop sfc driver functions

[Trinh Nguyen]

Currently, VNFFGNoop SFC driver is not used except for test.:

/opt/stack/tacker/tacker/nfvo/drivers/vnffg/sfc_drivers/noop.py

And the main functions have some unused parameters such as:

    def create_chain(self, name, fc_id, vnfs, auth_attr=None):
        instance_id = uuidutils.generate_uuid()
        self._instances.add(instance_id)
        return instance_id

Where name, fc_id, vnfs, and auth_attr are never used.

Should we consider removing this?