test: move remote specs to main process (#21387)

spec/static/main.js

@@ -77,7 +77,6 @@ ipcMain.on('echo', function (event, msg) {
 })
 
 global.setTimeoutPromisified = util.promisify(setTimeout)
-global.returnAPromise = (value) => new Promise((resolve) => setTimeout(() => resolve(value), 100))
 
 process.removeAllListeners('uncaughtException')
 process.on('uncaughtException', function (error) {
@@ -128,6 +127,7 @@ app.on('ready', function () {
     webPreferences: {
       backgroundThrottling: false,
       nodeIntegration: true,
+      enableRemoteModule: false,
       webviewTag: true
     }
   })