Remove non-ironic governed gerrit annoucements
Remove non-ironic governed gerrit annoucements

A few projects were removed from ironic governance
or were never part of ironic governance, but made
their way into the annoucements for #openstack-ironic.

Spot-checked and removed items that were not under
ironic's governance.

Change-Id: I8df37d966528b12a683ca18c5958721cc9d83790

openstack-infra/project-config,openstack-infra/project-config