code: public static void removeScopedSessionAttr( String attrName, HttpServletRequest request )
      {
          HttpSession session = request.getSession( false );
          
          if ( session != null )
          {
              session.removeAttribute( getScopedSessionAttrName( attrName, request ) );
          }
      }
docs: If the request is a ScopedRequest, this removes an attribute whose name is scoped to that request's scope-ID;
  otherwise, it is a straight passthrough to {@link HttpSession#removeAttribute}.
  
  @exclude