Remove outdated badge

Author: lpil

README.md

@@ -2,7 +2,6 @@
 
 <a href="https://github.com/gleam-lang/fetch/releases"><img src="https://img.shields.io/github/release/gleam-lang/fetch" alt="GitHub release"></a>
 <a href="https://discord.gg/Fm8Pwmy"><img src="https://img.shields.io/discord/768594524158427167?color=blue" alt="Discord chat"></a>
-![test](https://github.com/gleam-lang/fetch/workflows/test/badge.svg?branch=main)
 
 Bindings to JavaScript's built in HTTP client, `fetch`.