update readme

Author: adbenitez

README.md

@@ -1,6 +1,5 @@
 # Delta Chat JSON-RPC Code Generator
 
-[![Latest Release](https://img.shields.io/pypi/v/dcrpcgen.svg)](https://pypi.org/project/dcrpcgen)
 [![CI](https://github.com/deltachat/dcrpcgen/actions/workflows/python-ci.yml/badge.svg)](https://github.com/deltachat/dcrpcgen/actions/workflows/python-ci.yml)
 [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)