Update README.md

Author: mbonneau

README.md

@@ -3,13 +3,11 @@ RxPHP
 
 Reactive extensions for PHP. The reactive extensions for PHP are a set of
 libraries to compose asynchronous and event-based programs using observable
-collections and LINQ-style query operators in PHP.
+streams.
 
 [![CI status](https://github.com/ReactiveX/RxPHP/workflows/CI/badge.svg)](https://github.com/ReactiveX/RxPHP/actions)
 [![Coverage Status](https://coveralls.io/repos/github/ReactiveX/RxPHP/badge.svg?branch=master)](https://coveralls.io/github/ReactiveX/RxPHP?branch=master)
 
-note:  This repo is for v2.x, the latest version of RxPHP, not [v1.x](https://github.com/ReactiveX/RxPHP/tree/1.x).
-
 ## Example
 
 ```php