Remove unfubar_setuptools

It is no longer used for anything, nor does it seem to be
needed in the modern world of get-pip.py.

Change-Id: I5554514dd862a2004454daf295abbcf9cf9f2bfb
Merge "Remove unfubar_setuptools"
Merge commit 'refs/changes/83/86083/2' of git://gold.eng.hq.xensource.com/git/github/openstack-dev/devstack into tmpbranch