code: public void removeAttributeSilent(String attributeName) {
  
          CmsEntityAttribute attr = getAttribute(attributeName);
          if (attr != null) {
              if (attr.isSimpleValue()) {
                  m_simpleAttributes.remove(attributeName);
              } else {
                  for (CmsEntity child : attr.getComplexValues()) {
                      removeChildChangeHandler(child);
                  }
                  m_entityAttributes.remove(attributeName);
              }
          }
      }
docs: Removes the attribute without triggering any change events.<p>
  
  @param attributeName the attribute name