Remove custom subclass to re-enable software deployment by Heat

... because TripleO has migrated its deployment engine from heat to
config-download completely.

Change-Id: Id4c652d0b568bc351ba2606997be96f3ee3f1b37

undercloud_heat_plugins/config.py

@@ -1,30 +0,0 @@
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-from heat.engine.resources.openstack.heat import software_deployment
-from heat.engine.resources.openstack.heat import structured_config
-
-
-class SoftwareDeployment(software_deployment.SoftwareDeployment):
-    """A custom subclass to allow reverting replacement."""
-
-
-class StructuredDeployment(structured_config.StructuredDeployment):
-    """A custom subclass to allow reverting replacement."""
-
-
-def resource_mapping():
-    return {
-        'OS::TripleO::Heat::SoftwareDeployment': SoftwareDeployment,
-        'OS::TripleO::Heat::StructuredDeployment': StructuredDeployment
-    }