code: function(oDD) {
              for (var g in oDD.groups) {
                  if (g) {
                      var item = this.ids[g];
                      if (item && item[oDD.id]) {
                          delete item[oDD.id];
                      }
                  }
                  
              }
              delete this.handleIds[oDD.id];
          }
docs: Unregisters a drag and drop item.  This is executed in
  DragDrop.unreg, use that method instead of calling this directly.
  @method _remove
  @private
  @static