QmlDesigner: Remove unused variable

Change-Id: I8373ec5834a17f75887b2e70dba8c4c23694c768
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>

src/plugins/qmldesigner/components/formeditor/dragtool.cpp

@@ -276,7 +276,6 @@ static ItemLibraryEntry itemLibraryEntryFromMimeData(const QMimeData *mimeData)
 void DragTool::dragEnterEvent(const QList<QGraphicsItem*> &/*itemList*/, QGraphicsSceneDragDropEvent *event)
 {
     if (canHandleMimeData(event->mimeData())) {
-        QList<Import> importToBeAddedList;
         m_blockMove = false;
         if (hasItemLibraryInfo(event->mimeData())) {
             view()->widgetInfo().widget->setFocus();