remove babel-polyfill

package.json

@@ -17,7 +17,6 @@
     "babel-core": "^6.17.0",
     "babel-loader": "^6.2.5",
     "babel-plugin-transform-runtime": "^6.15.0",
-    "babel-polyfill": "^6.16.0",
     "babel-preset-es2015": "^6.16.0",
     "babel-preset-stage-2": "^6.17.0",
     "babel-register": "^6.16.3",

src/main.js

@@ -1,4 +1,3 @@
-import 'babel-polyfill';
 import Vue from 'vue';
 import 'bootstrap/dist/css/bootstrap.css';
 import 'font-awesome/css/font-awesome.css';