docs: public void removeIcon(int iIconType)
      {
          if (m_rgIcons == null)
              return;
          Object icon = m_rgIcons[iIconType - CalendarConstants.START_ICON];
          if (icon == null)
              return;
          m_rgIcons[iIconType - CalendarConstants.START_ICON] = null;   // Always at location 0
      }