Merge pull request #2094 from nicoddemus/remove-setuptools-pin

Remove setuptools pin now that upstream has been fixed

Author: nicoddemus

tox.ini

@@ -119,8 +119,6 @@ usedevelop=True
 skipsdist=True
 deps=
     PyYAML
-    # pinning setuptools because of AppVeyor failures, see pypa/setuptools#861
-    setuptools<29.0.0
 commands=
     pytest -rfsxX doc/en
     pytest --doctest-modules {toxinidir}/_pytest