remove PURGE command (#464)
remove PURGE command (#464)

pypi.org does the right thing and we don't need this any more.
lmctv/pynacl,lmctv/pynacl,lmctv/pynacl,pyca/pynacl,lmctv/pynacl,pyca/pynacl,lmctv/pynacl,reaperhulk/pynacl,reaperhulk/pynacl,reaperhulk/pynacl,pyca/pynacl,reaperhulk/pynacl,pyca/pynacl,reaperhulk/pynacl,pyca/pynacl