Remove broken badges

Author: danquirk

README.md

@@ -1,6 +1,4 @@
 [![Build Status](https://travis-ci.org/Microsoft/TypeScript.svg?branch=master)](https://travis-ci.org/Microsoft/TypeScript)
-[![Issue Stats](http://issuestats.com/github/Microsoft/TypeScript/badge/pr)](http://issuestats.com/github/microsoft/typescript)
-[![Issue Stats](http://issuestats.com/github/Microsoft/TypeScript/badge/issue)](http://issuestats.com/github/microsoft/typescript)
 [![npm version](https://badge.fury.io/js/typescript.svg)](http://badge.fury.io/js/typescript)
 [![Downloads](http://img.shields.io/npm/dm/TypeScript.svg)](https://npmjs.org/package/typescript)