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

doc/source/contributor/policies/bugs.rst

@@ -294,8 +294,8 @@ If the bug report is sound, move next:
   issue, make sure that there is at least one patch that 'Closes' the bug
   or document/question what it takes to mark the bug as fixed.
 * If the bug indicates test or gate failure, look at the failures for that
-  test over time using `OpenStack Health <http://status.openstack.org/openstack-health/#/>`_
-  or `OpenStack Logstash <http://logstash.openstack.org/#/dashboard/file/logstash.json>`_.
+  test over time using
+  `OpenStack Logstash <http://logstash.openstack.org/#/dashboard/file/logstash.json>`_.
   This can help to validate whether the bug identifies an issue that is
   occurring all of the time, some of the time, or only for the bug submitter.
 * If the bug is the result of a misuse of the system, mark the bug either

doc/source/contributor/stadium/governance.rst

@@ -85,7 +85,6 @@ mature OpenStack projects:
 
 * Exhaustive OpenStack CI coverage: unit, functional, and tempest coverage
   using OpenStack CI (upstream) resources so that `Grafana <https://grafana.opendev.org/d/f913631585/neutron-failure-rate>`_
-  and `OpenStack Health <http://status.openstack.org/openstack-health/#/>`_
   support is available. Access to CI resources and historical data by the
   team is key to ensuring stability and robustness of a project.
   In particular, it is of paramount importance to ensure that DB models/migrations