Problem: libzmq still depends on libsodium
Problem: libzmq still depends on libsodium

This dependency has been removed in libzmq master, by embedding
tweetnacl in libzmq/src.

Solution: remove dependency in known_projects.

hintjens/zproject,zeromq/zproject,paddor/zproject,eburkitt/zproject,keent/zproject,paddor/zproject,keent/zproject,zeromq/zproject,twhittock/zproject,twhittock/zproject,eburkitt/zproject,zeromq/zproject,taotetek/zproject,taotetek/zproject,taotetek/zproject,hintjens/zproject,paddor/zproject