Bye bye polyfill

package.json

@@ -148,7 +148,6 @@
     "uuid": "3.0.1",
     "vhost": "3.0.2",
     "websocket": "1.0.24",
-    "whatwg-fetch": "2.0.3",
     "xml2json": "0.11.0"
   }
 }

src/web/app/boot.js

@@ -26,9 +26,6 @@ riot.mixin({
 	CONFIG
 });
 
-// ↓ iOS待ちPolyfill (SEE: http://caniuse.com/#feat=fetch)
-require('whatwg-fetch');
-
 // ↓ NodeList、HTMLCollection、FileList、DataTransferItemListで forEach を使えるようにする
 if (NodeList.prototype.forEach === undefined) {
 	NodeList.prototype.forEach = Array.prototype.forEach;