fix: Remove isort and flake8 from setup.cfg

setup.cfg

@@ -21,33 +21,4 @@ replace =
 
 	{new_version} {utcnow:%%Y-%%m-%%d}
 	================
-
-[flake8]
-max-line-length = 119
-exclude =
-	*.egg-info,
-	.eggs,
-	.env,
-	.git,
-	.settings,
-	.tox,
-	.venv,
-	build,
-	data,
-	dist,
-	docs,
-	*migrations*,
-	requirements,
-	tmp
-
-[isort]
-line_length = 79
-skip = manage.py, *migrations*, .tox, .eggs, data, .venv, .env
-include_trailing_comma = true
-multi_line_output = 5
-lines_after_imports = 2
-default_section = THIRDPARTY
-sections = FUTURE, STDLIB, DJANGO, CMS, THIRDPARTY, FIRSTPARTY, LOCALFOLDER
-known_first_party = djangocms_snippet
-known_cms = cms, menus
-known_django = django
+