Merge words-setup-metadata-6402

Author: nothung
Reviewer: tomprince,rwall
Fixes: #6402

Remove mention of obsolete protocols from the twisted.words setup.py
metadata.



git-svn-id: svn://svn.twistedmatrix.com/svn/Twisted/trunk@38198 bbbe8e31-12d6-0310-92fd-ac37d47ddeeb