diff --git a/cyberwow/lib/controller/helper.dart b/cyberwow/lib/controller/helper.dart
deleted file mode 100644
index 9513d25..0000000
--- a/cyberwow/lib/controller/helper.dart
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
-
-Copyright 2019 fuwa
-
-This file is part of CyberWOW.
-
-CyberWOW is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-CyberWOW is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with CyberWOW.  If not, see <https://www.gnu.org/licenses/>.
-
-*/
-
-import 'dart:async';
-import 'dart:io';
-
-import 'package:path_provider/path_provider.dart';
-import 'package:flutter/foundation.dart';
-
-Future<String> getBinaryPath(final String name) async {
-  final tmpDir = await getTemporaryDirectory();
-  return tmpDir.path + '/' + name;
-}
-
-Future<bool> binaryExists(final String name) async {
-  final binPath = await getBinaryPath(name);
-  return new File(binPath).exists();
-}
diff --git a/cyberwow/lib/controller/process/run.dart b/cyberwow/lib/controller/process/run.dart
index e74490f..5aa2850 100644
--- a/cyberwow/lib/controller/process/run.dart
+++ b/cyberwow/lib/controller/process/run.dart
@@ -26,7 +26,6 @@ import 'dart:io';
 import 'dart:async';
 import 'dart:convert';
 
-import '../helper.dart';
 import '../../config.dart' as config;
 import '../../logging.dart';
 import '../../logic/sensor/helper.dart' as helper;
diff --git a/cyberwow/lib/state/loading.dart b/cyberwow/lib/state/loading.dart
index 3c9bd38..2fd8751 100644
--- a/cyberwow/lib/state/loading.dart
+++ b/cyberwow/lib/state/loading.dart
@@ -21,7 +21,6 @@ along with CyberWOW.  If not, see <https://www.gnu.org/licenses/>.
 
 import 'package:shared_preferences/shared_preferences.dart';
 
-import '../controller/helper.dart';
 import '../config.dart' as config;
 import '../logging.dart';
 import '../helper.dart';