Hide the Notifications meta box

I cant seem to hide the Notifications meta box on a post.

I like the functionality of the automatic alerts on a status change for a post, but I dont actually want people to see the Notifications box.

I’ve tried this but it doesnt seem to work.

if (is_admin()) :
		function remove_post_meta_boxes() {
			if(!current_user_can('activate_plugins')) {
				remove_meta_box('edit-flow-notifications', 'post', 'normal');
			}
		}
		add_action( 'admin_menu', 'remove_post_meta_boxes' );
	endif;

Can anyone help? How do I hide the Notifications box please?

http://wordpress.org/plugins/edit-flow/