Removed uneeded "electron-is-dev" package

lib/main-app.js

@@ -3,7 +3,7 @@ const app = electron.app
 const Menu = electron.Menu
 const ipc = electron.ipcMain
 const GhReleases = require('electron-gh-releases')
-const isDev = require('electron-is-dev') // isDev is True if running in development mode. Overide by setting ELECTRON_IS_DEV environment variable to 1
+const isDev = 'ELECTRON_IS_DEV' in process.env
 // electron.crashReporter.start()
 var ipcServer = null
 

package.json

@@ -59,7 +59,6 @@
     "codemirror-mode-elixir": "^1.1.1",
     "electron-config": "^1.0.0",
     "electron-gh-releases": "^2.0.4",
-    "electron-is-dev": "^1.0.1",
     "escape-string-regexp": "^1.0.5",
     "file-uri-to-path": "^1.0.0",
     "file-url": "^2.0.2",