In the WordPress.org forum, a user wanted to know how to disable email notifications for post status changes without also disabling email notifications for new editorial comments. Edit Flow makes this pretty simple to do. Simply add the following snippet to the functions.php file of your active theme and you’re good to go!
As of v0.6, Edit Flow hooks into ‘transition_post_status’ to add an email notification when the post status changes. To disable these email notifications, all you need to do is remove the hook.