add the information message

playbooks/roles/mysql/tasks/main.yml

@@ -9,6 +9,7 @@
     msg: "MySQL experimental is already installed, make remove_experimental_mysql: true in defaults/main.yml, if you want to remove it"
   when: "'5.6.14' in  mysql_56_installed.stdout and not remove_experimental_mysql"
 
+# remove this, once the new devstack is out
 - include: remove_mysql_experimental.yml
   when: remove_experimental_mysql