Stop setting [ovs_vif_ovs] ovsdb_interface

The option was already deprecated in os-vif 2.2.0[1]. The override is
no longer required since bug 1929446 was already resolved.

[1] https://review.opendev.org/c/openstack/os-vif/+/744816

Related-Bug: #1929446
Change-Id: I5bc55723a178b32d947da2ac91d2f62aa8124990
1 file changed