Move remove_uwsgi_config to cleanup_placement

It had been in stop_placement, but we don't want it there: the old
side of grenade needs to call that but should not remove the uwsgi
configuration when doing so. It is configuration, after all.

Change-Id: Iee763adf7895145d97b184924896db3f1f48a015
Partial-Bug: #1736385
1 file changed