Inline buttons and cancelId values

lib/renderer/inspector.js

@@ -8,17 +8,14 @@ window.onload = function () {
 
 window.confirm = function (message, title) {
   const {dialog} = require('electron').remote
-  let buttons, cancelId
   if (title == null) {
     title = ''
   }
-  buttons = ['OK', 'Cancel']
-  cancelId = 1
   return !dialog.showMessageBox({
     message: message,
     title: title,
-    buttons: buttons,
-    cancelId: cancelId
+    buttons: ['OK', 'Cancel'],
+    cancelId: 1
   })
 }