Since unify var-DISTUTILS_INSTALL_ARGS in distutils and setuptools,
- The local DISTUTILS_INSTALL_ARGS assignment is obsolete;
- The site.py is not be generated any more;
- The layout is in a standard pip dir (such as /usr/lib/python3.5/site-
packages/pip rather than /lib/python3.5/site-packages/pip-10.0.1-
py3.5.egg/pip), the pth file is not required;
`#!/usr/bin/env python3' is already used, do not manually sed.
[YOCTO #8446]
Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
