[pkg] Drop NO_SETUPTOOLS option setuptools is the defacto standard nowadays. The only place where NO_SETUPTOOLS option was used is during packaging (RPM, Debian) and even in this context, it seems that setuptools is the way to go (see https://wiki.debian.org/Python/LibraryStyleGuide).

# -*- coding: utf-8 -*-
# copyright %(year)s %(author)s, all rights reserved.
# contact %(author-web-site)s -- mailto:%(author-email)s
#
%(long-license)s
"""%(distname)s schema"""