project: remove the gitter badge

README.md

@@ -1,8 +1,5 @@
 # Registry [![Hackage](https://img.shields.io/hackage/v/registry.svg)](https://hackage.haskell.org/package/registry) [![Build Status](https://github.com/etorreborre/registry/workflows/CI/badge.svg)](https://github.com/etorreborre/registry/actions)
 
-
-[![Join the chat at https://gitter.im/etorreborre/registry](https://badges.gitter.im/etorreborre/registry.svg)](https://gitter.im/etorreborre/registry?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-
 ##### *It's functions all the way down* <img src="https://raw.githubusercontent.com/etorreborre/registry/main/doc/images/unboxed-bottomup.jpg" border="0"/>
 
 #### Presentation