Remove unusued BaseV1ImageRbacTest class

This PS removes unused BaseV1ImageRbacTest class as Patrole
removed suppor for Glance v1 some time ago with PS:
I5b2e47542b8e6a7a9c0ce7f5c9d4c76291fac8c1

Change-Id: I945043830a2e9fe653c8578b61183176a0ed7fd9
diff --git a/patrole_tempest_plugin/tests/api/image/rbac_base.py b/patrole_tempest_plugin/tests/api/image/rbac_base.py
index dd4e5ed..ed69c3d 100644
--- a/patrole_tempest_plugin/tests/api/image/rbac_base.py
+++ b/patrole_tempest_plugin/tests/api/image/rbac_base.py
@@ -19,21 +19,6 @@
 CONF = config.CONF
 
 
-class BaseV1ImageRbacTest(image_base.BaseV1ImageTest):
-
-    @classmethod
-    def skip_checks(cls):
-        super(BaseV1ImageRbacTest, cls).skip_checks()
-        if not CONF.patrole.enable_rbac:
-            raise cls.skipException(
-                "%s skipped as RBAC testing not enabled" % cls.__name__)
-
-    @classmethod
-    def setup_clients(cls):
-        super(BaseV1ImageRbacTest, cls).setup_clients()
-        cls.rbac_utils = rbac_utils.RbacUtils(cls)
-
-
 class BaseV2ImageRbacTest(image_base.BaseV2ImageTest):
 
     @classmethod