Comment out enabling dev tools

I feel like people should know how to do this but I have personally seen people getting confused as to why the developer tools show up. This would make it so you are not required to even touch this file

main.js

@@ -23,7 +23,7 @@ function createWindow () {
   }))
 
   // Open the DevTools.
-  mainWindow.webContents.openDevTools()
+  // mainWindow.webContents.openDevTools()
 
   // Emitted when the window is closed.
   mainWindow.on('closed', function () {