Remove unnecessary setUp and tearDown

This is to remove some setUp and tearDown that doing nothing
additional.

Change-Id: I84b10f19bbe35f5e83e74afa21a69844c9264ac3
diff --git a/tempest/api/compute/servers/test_server_rescue.py b/tempest/api/compute/servers/test_server_rescue.py
index 32faf7d..9834d02 100644
--- a/tempest/api/compute/servers/test_server_rescue.py
+++ b/tempest/api/compute/servers/test_server_rescue.py
@@ -61,9 +61,6 @@
         waiters.wait_for_server_status(cls.servers_client, cls.server_id,
                                        'ACTIVE')
 
-    def setUp(self):
-        super(ServerRescueTestJSON, self).setUp()
-
     @classmethod
     def resource_cleanup(cls):
         # Deleting the floating IP which is created in this method
@@ -72,9 +69,6 @@
             cls.sg_id)
         super(ServerRescueTestJSON, cls).resource_cleanup()
 
-    def tearDown(self):
-        super(ServerRescueTestJSON, self).tearDown()
-
     def _unrescue(self, server_id):
         self.servers_client.unrescue_server(server_id)
         waiters.wait_for_server_status(self.servers_client, server_id,
diff --git a/tempest/tests/lib/services/identity/v3/test_token_client.py b/tempest/tests/lib/services/identity/v3/test_token_client.py
index e9ef740..9f4b4cc 100644
--- a/tempest/tests/lib/services/identity/v3/test_token_client.py
+++ b/tempest/tests/lib/services/identity/v3/test_token_client.py
@@ -25,9 +25,6 @@
 
 class TestTokenClientV3(base.TestCase):
 
-    def setUp(self):
-        super(TestTokenClientV3, self).setUp()
-
     def test_init_without_authurl(self):
         self.assertRaises(exceptions.IdentityError,
                           token_client.V3TokenClient, None)