Remove strict option from setuptools check command

It fails because setup.py doesn't define a version.

Author: Jonathan Piron

tox.ini

@@ -39,7 +39,7 @@ deps=
     readme
     check-manifest
 commands=
-    python setup.py check -r -s
+    python setup.py check -r
     rst2html.py README.rst {envlogdir}/README.html --strict []
     check-manifest