remove setuptools

Author: Davide Moro

{{cookiecutter.project_slug}}/tox.ini

@@ -7,7 +7,6 @@ passenv = *
 deps=
     pip
     wheel
-    setuptools
     -rrequirements.txt
     -e.
 commands=py.test --junitxml=junit-{envname}.xml {posargs:{{cookiecutter.project_slug}}}