Remove check-manifest

setup.cfg

@@ -1,7 +1,2 @@
 [tool:pytest]
 xfail_strict = True
-
-[check-manifest]
-ignore =
-  .github
-  .github/*

tox.ini

@@ -23,6 +23,5 @@ deps =
   check-manifest
   flake8
 commands =
-  check-manifest {toxinidir}
   flake8 src setup.py
   python setup.py check --strict --metadata