build fix

app/lib/window.ts

@@ -1,5 +1,5 @@
 import { Subject, Observable } from 'rxjs'
-import { BrowserWindow, app, ipcMain, Rectangle, Menu } from 'electron'
+import { BrowserWindow, app, ipcMain, Rectangle } from 'electron'
 import ElectronConfig = require('electron-config')
 import * as yaml from 'js-yaml'
 import * as fs from 'fs'