Enable pylint useless-super-delegation check

Change code to remove unneeded super() calls.

In the case of the MaintenanceWorker class, the parent
classes never implement anything for stop() or wait()
so we can safely use 'pass'. They must exist since the
oslo.service class defines them as abtract methods.

TrivialFix

Change-Id: Ic8b184f077b6647c735e01cf89211f1fc613cb85

.pylintrc

@@ -47,7 +47,6 @@ disable=
  unused-argument,
  unused-import,
  unused-variable,
- useless-super-delegation,
  unnecessary-pass,
  raise-missing-from,
  arguments-renamed,

neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/commands.py

@@ -103,9 +103,6 @@ def _add_gateway_chassis(api, txn, lrp_name, val):
 
 
 class CheckLivenessCommand(command.BaseCommand):
-    def __init__(self, api):
-        super().__init__(api)
-
     def run_idl(self, txn):
         # txn.pre_commit responsible for updating nb_global.nb_cfg, but
         # python-ovs will not update nb_cfg if no other changes are made

neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/impl_idl_ovn.py

@@ -234,9 +234,6 @@ def get_ovn_idls(driver, trigger):
 
 
 class OvsdbNbOvnIdl(nb_impl_idl.OvnNbApiIdlImpl, Backend):
-    def __init__(self, connection):
-        super().__init__(connection)
-
     @n_utils.classproperty
     def connection_string(cls):
         return cfg.get_ovn_nb_connection()
@@ -913,9 +910,6 @@ class OvsdbNbOvnIdl(nb_impl_idl.OvnNbApiIdlImpl, Backend):
 
 
 class OvsdbSbOvnIdl(sb_impl_idl.OvnSbApiIdlImpl, Backend):
-    def __init__(self, connection):
-        super().__init__(connection)
-
     @n_utils.classproperty
     def connection_string(cls):
         return cfg.get_ovn_sb_connection()

neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/worker.py

@@ -31,11 +31,11 @@ class MaintenanceWorker(worker.BaseWorker):
 
     def stop(self):
         """Stop service."""
-        super().stop()
+        pass
 
     def wait(self):
         """Wait for service to complete."""
-        super().wait()
+        pass
 
     @staticmethod
     def reset():