resolve coverage conflict deps

Author: enver-bisevac

Makefile

@@ -67,9 +67,6 @@ lint: ## check style with flake8
 test: ## run tests quickly with the default Python
 	pytest
 
-report:
-	pytest --cov-report html --cov=featureflags tests/
-
 test-all: ## run tests on every Python version with tox
 	tox
 

requirements_dev.txt

@@ -14,7 +14,6 @@ twine==3.4.1
 pytest==5.1
 pytest-runner==5.1
 pytest-mock==3.6.1
-pytest-cov==3.0.0
 setuptools~=54.2.0
 httpx~=0.16.1
 attrs~=21.2.0