Update README.md

Remove circles build status.

Author: beeender

README.md

@@ -2,7 +2,7 @@ glrnvim
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
 [![All Contributors](https://img.shields.io/badge/all_contributors-10-orange.svg?style=flat-square)](#contributors-)
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-[![Build Status](https://travis-ci.com/beeender/glrnvim.svg?branch=master)](https://travis-ci.com/beeender/glrnvim)
+
 =======
 
 A really fast & stable neovim GUI could be accelated by GPU.