Remove unused methods

Cleanup a few unused methods.

Change-Id: I149246366527adeb38765559d09907a80c141593
diff --git a/tempest/api/orchestration/base.py b/tempest/api/orchestration/base.py
index beb4ac8..35f51b9 100644
--- a/tempest/api/orchestration/base.py
+++ b/tempest/api/orchestration/base.py
@@ -71,20 +71,6 @@
         cls.images = []
 
     @classmethod
-    def _get_default_network(cls):
-        networks = cls.network_client.list_networks()
-        for net in networks['networks']:
-            if net['name'] == CONF.compute.fixed_network_name:
-                return net
-
-    @classmethod
-    def _get_identity_admin_client(cls):
-        """Returns an instance of the Identity Admin API client."""
-        manager = clients.Manager(cls.isolated_creds.get_admin_creds())
-        admin_client = manager.identity_client
-        return admin_client
-
-    @classmethod
     def create_stack(cls, stack_name, template_data, parameters=None,
                      environment=None, files=None):
         if parameters is None:
diff --git a/tempest/test.py b/tempest/test.py
index 80eba94..ba15873 100644
--- a/tempest/test.py
+++ b/tempest/test.py
@@ -438,15 +438,6 @@
             cls.isolated_creds.clear_isolated_creds()
 
     @classmethod
-    def _get_identity_admin_client(cls):
-        """
-        Returns an instance of the Identity Admin API client
-        """
-        os = clients.AdminManager(service=cls._service)
-        admin_client = os.identity_client
-        return admin_client
-
-    @classmethod
     def set_network_resources(cls, network=False, router=False, subnet=False,
                               dhcp=False):
         """Specify which network resources should be created