Remove action “community_role_edit”

Hi,

As I don’t want that my custom role “Webmaster” can change the “user community role” during the process of editing a user, I’d like to remove the action “community_role_edit” that you call in “/core/um-user.php”. BTW I’ll can remove properly the list of role that you add at the bottom of “user-edit.php”.
So, I tried :

function remove_action_from_UM() {
	if ( !current_user_can( 'manage_options' ))
		remove_action('edit_user_profile', 'community_role_edit');
}
add_action('edit_user_profile', 'remove_action_from_UM', 9999);

But with no success :(.

Could you help me please?

TIA.

Amicably,

Pierre.