Remove Manager class

This commit removes Manager class which is unused now.

Change-Id: I49d3790c3f649a3d84e9d31f00b3f15a5dbaa36f
diff --git a/barbican_tempest_plugin/clients.py b/barbican_tempest_plugin/clients.py
index 9c009ba..6808da4 100644
--- a/barbican_tempest_plugin/clients.py
+++ b/barbican_tempest_plugin/clients.py
@@ -12,20 +12,11 @@
 # License for the specific language governing permissions and limitations under
 # the License.
 
-from tempest import clients
-from tempest.common import credentials_factory as common_creds
 from tempest import config
 from tempest.lib.services import clients as cli
 
 CONF = config.CONF
 
-ADMIN_CREDS = common_creds.get_configured_admin_credentials()
-
-
-class Manager(clients.Manager):
-    def __init__(self, credentials=ADMIN_CREDS):
-        super(Manager, self).__init__(credentials)
-
 
 class Clients(cli.ServiceClients):
     """Tempest stable service clients and loaded plugins service clients"""
diff --git a/barbican_tempest_plugin/tests/scenario/barbican_manager.py b/barbican_tempest_plugin/tests/scenario/barbican_manager.py
index 339cfb1..d560a63 100644
--- a/barbican_tempest_plugin/tests/scenario/barbican_manager.py
+++ b/barbican_tempest_plugin/tests/scenario/barbican_manager.py
@@ -30,7 +30,6 @@
 from oslo_log import log as logging
 from tempest import config
 
-from barbican_tempest_plugin import clients
 from barbican_tempest_plugin.tests.scenario import manager as mgr
 
 CONF = config.CONF
@@ -40,7 +39,6 @@
 class BarbicanScenarioTest(mgr.ScenarioTest):
 
     credentials = ('primary', 'admin')
-    manager = clients.Manager()
 
     def setUp(self):
         super(BarbicanScenarioTest, self).setUp()