nginx: no need to add www-data to any special group to read private ssl keys

Signed-off-by: Mattia Rizzolo <mattia@debian.org>

roles/nginx/tasks/setup.yml

@@ -41,14 +41,6 @@
   notify:
     - common.reload-firewall
 
-
-- name: Add the www-data user to the ssl-keys-read group
-  user:
-    name: www-data
-    groups: ssl-keys-read
-    append: yes
-
-
 - name: Add an hook to reload nginx when there are new ssl keys
   template:
     src: reload-nginx.sh