update readme

Author: kevindees

README.md

@@ -3,7 +3,6 @@
 This is the core framework of TypeRocket.
 
 <p align="center">
-<a href="https://travis-ci.org/TypeRocket/core"><img src="https://travis-ci.org/TypeRocket/core.svg?branch=main" alt="Build Status"></a>
 <a href="https://packagist.org/packages/typerocket/core"><img src="https://img.shields.io/packagist/dt/typerocket/core" alt="Total Downloads"></a>
 <a href="https://packagist.org/packages/typerocket/core"><img src="https://img.shields.io/packagist/v/typerocket/core" alt="Latest Stable Version"></a>
 <a href="https://packagist.org/packages/typerocket/core"><img src="https://img.shields.io/packagist/l/typerocket/core" alt="License"></a>