Designate - remove obsolete task

"Check if policies shall be overwritten" already exists in its
newer form. The removed one had no effect on play.

Change-Id: I48ed6c1c71c4162a3ab28ab2b51dc1e02932dfef
Signed-off-by: Radosław Piliszek <radoslaw.piliszek@gmail.com>

ansible/roles/designate/tasks/config.yml

@@ -151,11 +151,6 @@
 - include_tasks: backend_external.yml
   when: designate_backend_external == 'bind9'
 
-- name: Check if policies shall be overwritten
-  local_action: stat path="{{ node_custom_config }}/designate/policy.json"
-  run_once: True
-  register: designate_policy
-
 - name: Copying over existing policy file
   template:
     src: "{{ designate_policy_file_path }}"