clean up sample project

setup.cfg

-[tool:pytest]
-norecursedirs =
-    .git
-    dist
-    build
-addopts =
-    --strict
-    --doctest-modules
-    --durations=0
-
-[coverage:report]
-exclude_lines =
-    pragma: no-cover
-    pass
-
-[flake8]
-max-line-length = 120
-exclude = .tox,*.egg,build,temp
-select = E,W,F
-doctests = True
-verbose = 2
-# https://pep8.readthedocs.io/en/latest/intro.html#error-codes
-format = pylint
-# see: https://www.flake8rules.com/
-ignore =
-    E731  # Do not assign a lambda expression, use a def
-    W504  # Line break occurred after a binary operator
-    F401  # Module imported but unused
-    F841  # Local variable name is assigned to but never used
-    W605  # Invalid escape sequence 'x'
-
-# setup.cfg or tox.ini
-[check-manifest]
-ignore =
-    *.yml
-    .github
-    .github/*
-
-[metadata]
-license_file = LICENSE
-description-file = README.md
-# long_description = file:README.md
-# long_description_content_type = text/markdown