chore: more readme cleanup

Signed-off-by: Sam Gammon <sam@elide.dev>

README.md

@@ -17,7 +17,6 @@
 [![Maintainability Rating](https://sonarcloud.io/api/project_badges/measure?project=buildless_plugin-gradle&metric=sqale_rating)](https://sonarcloud.io/summary/new_code?id=buildless_plugin-gradle)
 [![Reliability Rating](https://sonarcloud.io/api/project_badges/measure?project=buildless_plugin-gradle&metric=reliability_rating)](https://sonarcloud.io/summary/new_code?id=buildless_plugin-gradle)
 [![Kotlin](https://img.shields.io/badge/Kotlin-1.9.21-blue.svg?logo=kotlin)](http://kotlinlang.org)
-[![Elide](https://elide.dev/shield)](https://elide.dev)
 
 This repo defines a plugin for Gradle which integrates with [Buildless][1] for [remote build caching][2].
 Buildless can be used as a [drop-in remote HTTPS cache endpoint][3], or you can use this plug-in which offers a number