don't create db for phabricator, it needs to do that on its own

roles/phabricator/tasks/main.yml

@@ -16,10 +16,6 @@
     - arcanist
     - phabricator
 
-- name: create mariadb database
-  delegate_to: "{{ mariadb_host }}"
-  mysql_db: name={{ phabricator_db_name }}
-
 - name: create mariadb user for phabricator
   delegate_to: "{{ mariadb_host }}"
   mysql_user: name={{ mariadb_user }} host={{ eth0_ip }} password={{ mariadb_password }} priv=*.*:ALL,CREATE state=present