fix: remove discord link

Author: LeoBorai

README.md

@@ -15,7 +15,6 @@
   ![Formatter](https://github.com/http-server-rs/http-server/workflows/fmt/badge.svg)
   ![Tests](https://github.com/http-server-rs/http-server/workflows/test/badge.svg)
   ![Benchs](https://github.com/http-server-rs/http-server/workflows/bench/badge.svg)
-  [![Discord](https://img.shields.io/discord/1124069466259591201?color=blue&label=discord&logo=discord)](https://discord.gg/qJgv2p9Ebf)
 
 </div>