multinode: Revert to default Ceph release & tag

The overrides were for Yoga, and aren't required for Antelope.

Author: markgoddard

etc/kayobe/environments/ci-multinode/cephadm.yml

@@ -2,12 +2,6 @@
 ###############################################################################
 # Cephadm deployment configuration.
 
-# Ceph release name.
-cephadm_ceph_release: "{{ 'quincy' if (ansible_facts['distribution_release'] == 'jammy' or ansible_facts.distribution_major_version == '9') else 'pacific' }}"
-
-# Ceph container image tag.
-cephadm_image_tag: "{{ 'v17.2.7' if cephadm_ceph_release == 'quincy' else 'v16.2.14' }}"
-
 # Ceph OSD specification.
 cephadm_osd_spec:
   service_type: osd