octavia: drop warning about certificate changes

The change happened in Train, time to move on.

Change-Id: Ie58265284b2e6b4b30b24fc2f22dd4f5eec05d5b

ansible/roles/octavia/tasks/precheck.yml

@@ -35,14 +35,6 @@
     - container_facts['octavia_health_manager'] is not defined
     - inventory_hostname in groups['octavia-health-manager']
 
-- name: Warn about certificate changes
-  debug:
-    msg: >-
-      Octavia's certificate configuration has been changed since Train. The new
-      configuration requires 4 PEM files. Please check certificate configuration
-      guide at https://docs.openstack.org/octavia/latest/admin/guides/certificates.html
-  when: "'amphora' in octavia_provider_drivers"
-
 - name: Checking certificate files exist for octavia
   stat:
     path: "{{ node_custom_config }}/octavia/{{ item }}"