Disable redundant shutoff of ephemeral heat

Ephemeral heat is shut off just after a Heat stack is created and
playbooks are generated. Thus we don't need to shut it off again.

Exporting stack no longer launches the ephemeral heat service since
commit d7af2f5482 was merged.

Change-Id: Ib4d12a6e8227f5f7764761c4904d569625c7ed88

tripleoclient/v1/overcloud_deploy.py

@@ -1294,14 +1294,6 @@ class DeployOvercloud(command.Command):
                     rcpath, old_rcpath))
                 print("Overcloud Deployed {0}".format(deploy_message))
 
-            try:
-                self.log.info("Stopping ephemeral heat.")
-                utils.kill_heat(self.heat_launcher)
-                utils.rm_heat(self.heat_launcher)
-            except Exception as e:
-                self.log.error('Exception stopping ephemeral Heat')
-                self.log.error(e)
-
             try:
                 if parsed_args.output_dir:
                     ansible_dir = config_download_dir