[certbot] Remove obsolete DNS lookup

Signed-off-by: Yohann D'ANELLO <ynerant@crans.org>

roles/certbot/tasks/main.yml

@@ -10,13 +10,6 @@
   retries: 3
   until: apt_result is succeeded
 
-- name: Lookup DNS masters IPv4
-  set_fact:
-    #dns_masters_ipv4: "{{ bind.masters | json_query('servers[].interface[?vlan_id==`2`].ipv4[]') }}"
-    dns_masters_ipv4:
-      - "172.16.10.147"
-    cacheable: true
-
 - name: Add DNS credentials
   template:
     src: letsencrypt/rfc2136.ini.j2