remove outdated maintained badge

Author: ripytide

README.md

@@ -2,7 +2,6 @@
 
 ![License](https://img.shields.io/github/license/ripytide/nodit)
 [![Docs](https://docs.rs/nodit/badge.svg)](https://docs.rs/nodit)
-[![Maintained](https://img.shields.io/maintenance/yes/2024)](https://github.com/ripytide)
 [![Crates.io](https://img.shields.io/crates/v/nodit)](https://crates.io/crates/nodit)
 
 <p align="center">