Don't use polyfill anymore

lib/app/client.js

@@ -1,7 +1,5 @@
 'use strict'
 
-require('es6-object-assign').polyfill()
-import 'es6-promise/auto'
 import Vue from 'vue'
 import { app, router<%= (store ? ', store' : '') %> } from './index'
 import { getMatchedComponents, getMatchedComponentsInstances, flatMapComponents, getContext, promisify, getLocation, compile } from './utils'

lib/app/index.js

@@ -1,6 +1,5 @@
 'use strict'
 
-require('es6-object-assign').polyfill()
 import Vue from 'vue'
 import Meta from 'vue-meta'
 import router from './router.js'

lib/build/index.js

@@ -289,7 +289,7 @@ function createWebpackMiddlewares () {
   clientConfig.entry.app = _.flatten(['webpack-hot-middleware/client?reload=true', clientConfig.entry.app])
   clientConfig.plugins.push(
     new webpack.HotModuleReplacementPlugin(),
-    new webpack.NoErrorsPlugin()
+    new webpack.NoEmitOnErrorsPlugin()
   )
   const clientCompiler = webpack(clientConfig)
   // Add the middlewares to the instance context

lib/build/webpack/base.config.js

@@ -18,7 +18,7 @@ export default function ({ isClient, isServer }) {
   let config = {
     devtool: 'source-map',
     entry: {
-      vendor: ['vue', 'vue-router', 'vue-meta', 'es6-promise', 'es6-object-assign']
+      vendor: ['vue', 'vue-router', 'vue-meta']
     },
     output: {
       publicPath: urlJoin(this.options.router.base, '/_nuxt/')