Automatically update conversations membership based on group membership update

src/controllers/groups_controller.rs

@@ -314,8 +314,6 @@ pub fn send_request(r: &mut HttpRequestHandler) -> RequestResult {
         following: true,
     })?;
 
-    // TODO : if the user has already the "member" level, gives him access to conversations
-
     // Send a notification, if required
     if matches!(group.registration_level, GroupRegistrationLevel::MODERATED_REGISTRATION) {
         notifications_helper::create_group_membership_notification(r.user_id_ref()?, None,