purge/update: remove backward compatibility legacy

This was introduced in 3.1 and marked as deprecation
We can definitely drop it in stable-4.0

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>
(cherry picked from commit 0441812959)

infrastructure-playbooks/purge-cluster.yml

@@ -129,7 +129,6 @@
     - grafana-server
     - clients
     - iscsigws
-    - iscsi-gws # for backward compatibility only!
 
   become: true
 

infrastructure-playbooks/purge-iscsi-gateways.yml

@@ -22,7 +22,6 @@
 - name: stopping the gateways
   hosts:
     - iscsigws
-    - iscsi-gws # for backward compatibility only!
   become: yes
   vars:
     - igw_purge_type: "{{hostvars['localhost']['igw_purge_type']}}"
@@ -41,7 +40,6 @@
 - name: removing the gateway configuration
   hosts:
     - iscsigws
-    - iscsi-gws # for backward compatibility only!
   become: yes
   vars:
     - igw_purge_type: "{{ hostvars['localhost']['igw_purge_type'] }}"

infrastructure-playbooks/rolling_update.yml

@@ -864,7 +864,6 @@
     upgrade_ceph_packages: True
   hosts:
     - "{{ iscsi_gw_group_name|default('iscsigws') }}"
-    - iscsi-gws # for backward compatibility only!
   serial: 1
   become: True
   tasks: