Remove unused pubsub stuff

appengine/gce-backend/catalog.py

 # Copyright 2016 The LUCI Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0
 # that can be found in the LICENSE file.
 
 """Utilities for interacting with the Machine Provider catalog."""
 
 import json
 import logging
 
 from google.appengine.ext import ndb
 from protorpc.remote import protojson
 
 from components import gce
 from components import machine_provider
 from components import net
 from components import utils
 
 import instances
 import instance_group_managers
 import metrics
 import models
-import pubsub
 
 
 def get_policies(key, service_account):
   """Returns Machine Provider policies governing the given instance.
 
   Args:
     key: ndb.Key for a models.Instance entity.
     service_account: Name of the service account the instance will use to
       talk to Machine Provider.
   """
   return {
       'backend_attributes': {
           'key': 'key',
           'value': key.urlsafe(),
       },
-      'backend_project': pubsub.get_machine_provider_topic_project(),
-      'backend_topic': pubsub.get_machine_provider_topic(),

[ryanmartens, 2016/11/04 14:02:52]

We should probably update the comment in the Policies message to capture the
changes regarding the communication with the GCE Backend specifically:
https://github.com/luci/luci-py/blob/master/appengine/components/components/m...

[ryanmartens, 2016/11/04 14:02:52]

Also, are you planning on pulling out the notification on this channel from
machine provider in another CL, or should you combine it with this one?
https://github.com/luci/luci-py/blob/884aff5a309833270d9243e919e19a4a35ed143a...

[smut, 2016/11/04 21:09:21]

Everything there is technically true, MP will still communicate with its
backends on a backend_topic if provided.

[smut, 2016/11/04 21:09:21]

Right now backend notification is optional, if backend_topic is present. I'm
guessing we will want to remove this altogether, but I'm not 100% sure that no
backend will use it. I'll save MP and Policies changes for a separate CL if I
completely remove support for backend_topic.

       'machine_service_account': service_account,
       'on_reclamation': 'DELETE',
   }
 
 
 def extract_dimensions(instance, instance_template_revision):
   """Extracts Machine Provider dimensions.
 
   Args:
     instance: models.Instance entity.
@@ skipping 204 matching lines @@
   for instance in models.Instance.query():
     if instance.cataloged:
       if not utils.enqueue_task(
           '/internal/queues/update-cataloged-instance',
           'update-cataloged-instance',
           params={
               'key': instance.key.urlsafe(),
           },
       ):
         logging.warning('Failed to enqueue task for Instance: %s', instance.key)