Remove unnecessary setUp()

The setUp() of ContainerTest doesn't do any special thing, we can
remove it for the cleanup.

Change-Id: Ie3ba559f24936b325fa1ca107456ffab0ba216e8
diff --git a/tempest/api/object_storage/test_container_services.py b/tempest/api/object_storage/test_container_services.py
index 296d8ee..17ac308 100644
--- a/tempest/api/object_storage/test_container_services.py
+++ b/tempest/api/object_storage/test_container_services.py
@@ -19,9 +19,6 @@
 
 
 class ContainerTest(base.BaseObjectTest):
-    def setUp(self):
-        super(ContainerTest, self).setUp()
-
     def tearDown(self):
         self.delete_containers()
         super(ContainerTest, self).tearDown()