Remove fixup_python_packages

The hack has be around for pip 1.4.1 and older. It should be safe to
remove it by now. In fact it causes problems in my Ubutu Bionic VM when
trying to overwrite httplib2 library installed from the distro package.

Change-Id: I34b826f4e8f10f8d44b888120f19fcc7ba501b3d
1 file changed