Ghanshyam Mann 9183213067 Remove reference of openstack-health
openstack-health is retiring[1] so removing the
reference of it from contributor doc.

[1] https://review.opendev.org/c/openstack/governance/+/836706/2

Change-Id: Id6af0626987b89f109ffee1044469112d3ff3110
2022-04-05 19:44:58 -05:00
..