Revert "Enforces minimum Ceph client version to Mimic"

This reverts commit 8d962f1362.

There is additional work to be done in Glance/Cinder to handle correctly images moved to 'trash'

Change-Id: Id3d1f23f8a1b393db587d4dcc4cffc3bd09e3935
Closes-Bug: 1951433

deployment/ceph-ansible/ceph-mon.yaml

@@ -98,24 +98,5 @@ outputs:
                 copy:
                   dest: "{{playbook_dir}}/ceph-ansible/group_vars/mons.yml"
                   content: "{{ceph_ansible_group_vars_mons|to_nice_yaml}}"
-        - - name: ceph_base_external_deploy_finish
-            # NOTE(gfidente): enforce minimum client version to mimic to use RBD clone v2 with Cinder
-            when: step|int == 3
-            become: true
-            tags:
-              - ceph
-            block:
-              - name: Get ceph-mon container ID
-                # Supposed to work with cephadm and ceph-ansible formats
-                # ceph-4b5c8c0a-ff60-454b-a1b4-9747aa737d19-mon.standalone.localdomain
-                # ceph-mon-standalone
-                command: "{{ container_cli }} ps -q -f 'name=ceph-?(.*)-mon.*'"
-                register: ceph_mon_id
-                delegate_to: "{{ groups['ceph_mon'][0] }}"
-              - name: Enforce minimum Ceph clients version to Mimic
-                command: "{{ container_cli }} exec {{ ceph_mon_id.stdout_lines[0] }} ceph --cluster {{ cluster }} osd set-require-min-compat-client mimic"
-                delegate_to: "{{ groups['ceph_mon'][0] }}"
-                vars:
-                  cluster: {get_param: CephClusterName}
       external_update_tasks: {get_attr: [CephBase, role_data, external_update_tasks]}
       external_upgrade_tasks: {get_attr: [CephBase, role_data, external_upgrade_tasks]}