Cleaning up gnome-software git a bit

[Richard Hughes <hughsient gmail com>]

Hi all,

The following branches have not had much activity for the last few months:

  origin/wip/attente/reviews
  origin/wip/iainl/ubuntu-xenial
  origin/wip/jrocha/abstract-app-tiles
  origin/wip/jrocha/add-manage-updates-setting
  origin/wip/jrocha/allow-updates-setting
  origin/wip/jrocha/fix-screenshots
  origin/wip/jrocha/fix-updates-list
  origin/wip/jrocha/flatpak-appstream-fixes
  origin/wip/jrocha/flatpak-user-and-system
  origin/wip/jrocha/reference-category
  origin/wip/jrocha/updates-monitor-with-allow-updates
  origin/wip/kalev/extensions
  origin/wip/kalev/gnome-3-22-prep
  origin/wip/kalev/list-model
  origin/wip/rancell/3-20-enhancements
  origin/wip/rancell/apt
  origin/wip/rancell/install-remove-auth
  origin/wip/rancell/paid
  origin/wip/rancell/reviews
  origin/wip/rancell/reviews-3-18
  origin/wip/rancell/snapauth
  origin/wip/rancell/snapd-glib
  origin/wip/rancell/snaps
  origin/wip/rancell/ubuntu-provenance
  origin/wip/rancell/ubuntu-xenial-rebase
  origin/wip/rancell/ubuntuone
  origin/wip/ubuntu
  origin/wip/ubuntu-changes
  origin/wip/ubuntu-xenial
  origin/wip/ubuntu-zesty
  origin/wip/william/cherry-pick
  origin/wip/william/cherry-pick-3
  origin/wip/william/cherry-pick-4
  origin/wip/william/request-refresh

Are there any branches that can be deleted? I've got no problem with
keeping branches that are actually useful, but there appear to be
quite a few abandoned temp branches that we can cleanup. If there are
any branches that need rebasing against master and reviewed now is the
time in the cycle to do it :)

As a reminder, you can delete a remote branch using something like git
push origin :the-branch-name or if you want I can delete them for you
if email is easier.

Thanks!

Richard.