/etc/init/maas-celery.conf not removed on upgrade

This bug was fixed in the package maas - 0.1+bzr1223+dfsg-0ubuntu1

---------------
maas (0.1+bzr1223+dfsg-0ubuntu1) quantal; urgency=low

  * New upstream release. (LP: #1062518)

  [ Julian Edwards ]
  * Split packaging of 'maas' into maas-{region,cluster}-controller
    - debian/control: Update accordingly.
    - debian/*.install: Move files accordingly
    - debian/*.{postinst,postrm,preinst}: Move files accordingly.
  * Ensure isc-dhcp-server is disabled when installing maas-dhcp.
  * Ensure maas-dns creates the maas user before trying to chown files.
  * Make maas-cluster-controller autoconfigure itself when upgrading from the
    old maas package. (LP: #1059416)
  * Add missing prerm file for maas-cluster-controller so that .pyc files
    are cleaned up. (LP: #1059973)

  [ Raphaël Badin ]
  * Install maas_local_celeryconfig.py in /etc/maas and symlink to
    /usr/share/maas.
  * debian/maas.postinst: Create rabbitmq celery user/vhost.
  * debian/maas.postinst: Update BROKER_URL in maas_local_celeryconfig.py.
  * Use maas_local_celeryconfig_cluster.py as the local celery
    configuration file for the cluster worker.
  * debian/maas-region-controller.maas-region-celery.upstart: Add region
    worker upstart script.
  * Rename cluster worker upstart script into
    maas-cluster-controller.maas-clluster-celery.upstart.
  * maas-cluster-controller.maas-celery.upstart: use "celeryconfig_cluster"
    as the Celery config module.
  * debian/maas-common.install: Install celeryconfig_common.py.
  * debian/maas-cluster-controller.install: Install celeryconfig_cluster.py.
  * debian/maas-region-controller.install: Install celeryconfig.py.
  * Split celery config into cluster and region configs.
  * Add region celeryd upstart config.
  * Define CELERY_CONFIG_MODULE in
    maas-cluster-controller.maas-cluster-celery.upstart

  [ Jeroen Vermeulen ]
  * Make maas_local_celery_config.py non-world readable.
  * Make maas_local_celeryconfig_cluster.py non-world readable.
  * Set root:maas ownership of local cluster config only *after*
    the maas user/group have been created

  [ Andres Rodriguez ]
  * debian/maas.postinst:
    - Always restart apache2.
    - Handle upgrades for new upstream release.
    - Handle upgrades for celery rabbitmq worker.
  * Add binary package to install client tool.
    - debian/extras/maas-cli: Add binary.
    - debian/maas-cli.install: Add. Install maascli and apiclient.
    - debian/control: Add binary package.
  * debian/control:
    - Depends on freeipmi-tools instead of ipmitool.
    - Conflicts/Replaces on maas for python-maas-client.
    - Depends on python-netifaces, python-lxml.
  * Add python-maas-client binary package:
    - debian/python-maas-client.install: Add. Install 'apiclient' python module.
    - debian/control: Add package. python-django-maas and maas-cli now
      Depend on it.
  * debian/rules: Install maas-dhcp-server upstart job.
  * debian/maas.postrm: Remove celery worker rabbitmq user and host.
  * debian/extras/99-maas-sudoers: Add for maas-dhcp-server upstart job
    instead of isc-dhcp-server (LP: #1055951)
  * debian/maas-region-controller.postinst: Cleanup upgrade rules.
  * debian/maas-cl...