Remove retired projects from the sync list

Depends-On: https://review.opendev.org/c/openstack/governance/+/935677
Change-Id: I5d9f9fa63b5ab8f562663470a73a343790b9d57f

projects.txt

@@ -118,13 +118,11 @@ openstack/openstack-ansible-os_heat
 openstack/openstack-ansible-os_horizon
 openstack/openstack-ansible-os_ironic
 openstack/openstack-ansible-os_keystone
-openstack/openstack-ansible-os_karbor
 openstack/openstack-ansible-os_magnum
 openstack/openstack-ansible-os_neutron
 openstack/openstack-ansible-os_nova
 openstack/openstack-ansible-os_octavia
 openstack/openstack-ansible-os_rally
-openstack/openstack-ansible-os_sahara
 openstack/openstack-ansible-os_swift
 openstack/openstack-ansible-os_tacker
 openstack/openstack-ansible-os_tempest