docs: drop static coverage badge (rot-prone)

Author: zeevdr

README.md

@@ -4,7 +4,6 @@
 [![PyPI](https://img.shields.io/pypi/v/opendecree)](https://pypi.org/project/opendecree/)
 [![Python](https://img.shields.io/pypi/pyversions/opendecree)](https://pypi.org/project/opendecree/)
 [![Downloads](https://img.shields.io/pypi/dm/opendecree)](https://pypi.org/project/opendecree/)
-[![Coverage](https://img.shields.io/badge/coverage-98%25-brightgreen)](https://github.com/opendecree/decree-python)
 [![License](https://img.shields.io/github/license/opendecree/decree-python)](LICENSE)
 [![Project Status: WIP](https://www.repostatus.org/badges/latest/wip.svg)](https://www.repostatus.org/#wip)