add* backup and restore db

lib/home.dart

@@ -285,7 +285,6 @@ class _HomeState extends State<Home> {
                                   }
                                   if(isclear??false){
                                     var result = await DBHelper.database.restoreDb(context);
-                                    print("respond $result");
                                     if(result["STATUS"]==1){
                                       // await prefs.remove(keyClass.lastDownload);
                                       // await prefs.remove(keyClass.lastUpload);