Remove #openstack-neutron-ovn.

This channel is deprecated.

Change-Id: Ie73e795565fe160a19e849fda2718f081c089a9c
Signed-off-by: Russell Bryant <rbryant@redhat.com>

hiera/common.yaml

@@ -86,7 +86,6 @@ statusbot_channels:
 - openstack-mogan
 - openstack-monasca
 - openstack-neutron
-- openstack-neutron-ovn
 - openstack-nova
 - openstack-oslo
 - openstack-outreachy
@@ -180,7 +179,6 @@ meetbot_channels:
 - '#openstack-monasca'
 - '#openstack-net-bgpvpn'
 - '#openstack-neutron'
-- '#openstack-neutron-ovn'
 - '#openstack-nova'
 - '#openstack-operators'
 - '#openstack-oslo'