Don't use password for nullmailer

Signed-off-by: Emmy D'Anello <ynerant@emy.lu>

group_vars/all/nullmailer.yml

@@ -4,5 +4,3 @@ glob_nullmailer:
   smtp_server: smtp.adm.ynerant.fr
   defaulthost: ynerant.fr
   allmailfrom: root@ynerant.fr
-  username: noreply@ynerant.fr
-  password: "{{ vault.mailu_password }}"

roles/nullmailer/tasks/main.yml

@@ -11,7 +11,7 @@
 
 - name: Set nullmailer remotes
   copy:
-    content: "{{ nullmailer.smtp_server }} smtp --auth-login --user={{ nullmailer.username }} --pass='{{ nullmailer.password }}'\n"
+    content: "{{ nullmailer.smtp_server }} smtp'\n"
     dest: /etc/nullmailer/remotes
     mode: 0644