remove halo from readme

Author: LinuxSuRen

README.md

@@ -104,5 +104,3 @@ TODO
 ```
 [![LinuxSuRen/open-source-best-practice](https://img.shields.io/static/v1?label=OSBP&message=%E5%BC%80%E6%BA%90%E6%9C%80%E4%BD%B3%E5%AE%9E%E8%B7%B5&color=blue)](https://github.com/LinuxSuRen/open-source-best-practice)
 ```
-
-* [Halo](https://github.com/halo-dev/halo)