message: remove old saucelabs badge.
diff: [![npm version](https://badge.fury.io/js/%40reactivex%2Frxjs.svg)](http://badge.fury.io/js/%40reactivex%2Frxjs)
  [![Join the chat at https://gitter.im/Reactive-Extensions/RxJS](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/Reactive-Extensions/RxJS?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
  -[![Selenium Test Status](https://saucelabs.com/browser-matrix/rxjs5.svg)](https://saucelabs.com/u/rxjs5)
  -
  # RxJS 7 (alpha)
  ### FOR 6.X PLEASE GO TO [THE 6.x BRANCH](https://github.com/ReactiveX/rxjs/tree/6.x)
  