feature：修复报错

devices/bt_helper.js

@@ -11,7 +11,7 @@ const ble = require('./ble_manager');
 // const EventManager = require('./EventManager');
 // const CmdBase = require('./../devices/bluetooth/bt_cmd');
 const bleManager = require('./ble_manager');
-const QueueManager = require('./QueueManager');
+// const QueueManager = require('./QueueManager');
 
 // const EnumConnectStatus = require('./EnumConnectStatus');
 // const EnumOpen = require('./EnumOpen');