docs: Update README.md

README.md

@@ -1,7 +1,6 @@
 # github3api
 [![GitHub Workflow Status](https://github.com/soda480/github3api/workflows/build/badge.svg)](https://github.com/soda480/github3api/actions)
 [![Code Coverage](https://codecov.io/gh/soda480/github3api/branch/master/graph/badge.svg)](https://codecov.io/gh/soda480/github3api)
-[![Code Grade](https://api.codiga.io/project/13337/status/svg)](https://frontend.code-inspector.com/project/13337/dashboard)
 [![vulnerabilities](https://img.shields.io/badge/vulnerabilities-None-brightgreen)](https://pypi.org/project/bandit/)
 [![PyPI version](https://badge.fury.io/py/github3api.svg)](https://app.codiga.io/public/project/13337/github3api/dashboard)
 [![python](https://img.shields.io/badge/python-3.7%20%7C%203.8%20%7C%203.9%20%7C%203.10-teal)](https://www.python.org/downloads/)