remove postintall

Author: kkkcccliang

Diff for: package.json

@@ -4,7 +4,6 @@
   "description": "A simple starter Angular2 project",
   "scripts": {
     "typings-install": "node node_modules/typings/dist/bin.js install",
-    "postinstall": "npm run typings-install",
     "build": "node node_modules/webpack/bin/webpack.js --inline --colors --progress --display-error-details --display-cached",
     "watch": "npm run build -- --watch",
     "server": "node node_modules/webpack-dev-server/bin/webpack-dev-server.js --inline --colors --progress --display-error-details --display-cached --port 3000  --content-base src",