update badges.

README.zh-cn.md

@@ -1,6 +1,5 @@
 # CAP
 [![Travis branch](https://img.shields.io/travis/dotnetcore/CAP/master.svg?label=travis-ci)](https://travis-ci.org/dotnetcore/CAP)
-[![Travis](https://travis-ci.org/dotnetcore/CAP.svg?branch=master)](https://travis-ci.org/dotnetcore/CAP)
 [![AppVeyor](https://ci.appveyor.com/api/projects/status/4mpe0tbu7n126vyw?svg=true)](https://ci.appveyor.com/project/yuleyule66/cap)
 [![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/dotnetcore/CAP/master/LICENSE.txt)