remove dup standard

Author: antoinebaudoux

README.md

@@ -1,6 +1,5 @@
 # typescript-http-client
 [![Build Status](https://travis-ci.com/taktik/typescript-http-client.svg?branch=master)](https://travis-ci.com/taktik/typescript-http-client)
-[![js-standard-style](https://cdn.rawgit.com/standard/standard/master/badge.svg)](http://standardjs.com)
 [![js-standard-style](https://img.shields.io/badge/code%20style-standard-brightgreen.svg)](http://standardjs.com)
 
 A simple TypeScript HTTP client with Promise-based API and advanced filtering support