Remove workaround for gitlab.com/pycqa/flake8/issues/275, apparently no longer necessary.
@@ -3,5 +3,3 @@ norecursedirs=dist build .tox .eggs
addopts=--doctest-modules --flake8 --black --cov
doctest_optionflags=ALLOW_UNICODE ELLIPSIS
filterwarnings=
- # workaround for https://gitlab.com/pycqa/flake8/issues/275
- ignore:You passed a bytestring as `filenames`.::flake8
