Update README.md

Remove unused Codecov badge

Author: AppSolves

README.md

@@ -14,7 +14,6 @@
 </p>
 
 [![build](https://github.com/AppSolves/fastapi-users-db-dynamodb/workflows/Build/badge.svg)](https://github.com/fastapi-users/fastapi-users/actions)
-[![codecov](https://codecov.io/gh/AppSolves/fastapi-users-db-dynamodb/branch/master/graph/badge.svg)](https://codecov.io/gh/AppSolves/fastapi-users-db-dynamodb)
 [![PyPI version](https://badge.fury.io/py/fastapi-users-db-dynamodb.svg)](https://badge.fury.io/py/fastapi-users-db-dynamodb)
 [![Downloads](https://pepy.tech/badge/fastapi-users-db-dynamodb)](https://pepy.tech/project/fastapi-users-db-dynamodb)