docs: Reinstate pytest.ini

Turns out Pytest doesn't support log-format specification in setup.cfg declarations. See pytest-dev/pytest#3062.

Author: sondrelg

setup.cfg

@@ -43,7 +43,6 @@ exclude =
     venv,
     manage.py
 
-
 max-complexity = 15
 
 [mypy]
@@ -65,8 +64,3 @@ allow_redefinition = False
 
 [mypy-tests.*]
 ignore_errors = True
-
-[tool:pytest]
-DJANGO_SETTINGS_MODULE = demoproj.settings
-log_cli=True
-log_cli_format = %(levelname)s %(asctime)s [%(correlation_id)s] %(name)s %(message)s