message: Remove unused method `notificationFromIndex`
diff: @@ -48,11 +48,6 @@ public:
  NotificationCallback& notificationClicked() { return mNotificationClicked; }
  - const Notification& notificationFromIndex(int index)
  - {
  - return mNotificationList.at(static_cast<size_t>(index));
  - }
  -
  void update() override;
  protected:
  