Problem: README.md contains outdated paragraph about message filtering
Problem: README.md contains outdated paragraph about message filtering

This functionality used to exist and it was complex, so it was removed.
See #301.

Solution: Remove paragraph.

vyskocilm/zproto,bkmit/zproto,somdoron/zproto,c-rack/zproto,jdiez17/zproto,sappo/zproto,sappo/zproto,jdiez17/zproto,c-rack/zproto,asokoloski/zproto,asokoloski/zproto,sappo/zproto,vyskocilm/zproto,somdoron/zproto,zeromq/zproto,zeromq/zproto,bkmit/zproto,c-rack/zproto,c-rack/zproto,jdiez17/zproto,asokoloski/zproto,somdoron/zproto,somdoron/zproto,hintjens/zproto,c-rack/zproto,asokoloski/zproto,asokoloski/zproto,c-rack/zproto,sappo/zproto,bkmit/zproto,c-rack/zproto,bkmit/zproto,bkmit/zproto,somdoron/zproto,jdiez17/zproto,somdoron/zproto,vyskocilm/zproto,zeromq/zproto,hintjens/zproto,hintjens/zproto,vyskocilm/zproto,somdoron/zproto,hintjens/zproto,asokoloski/zproto,zeromq/zproto,hintjens/zproto,hintjens/zproto,zeromq/zproto,vyskocilm/zproto,zeromq/zproto,asokoloski/zproto,vyskocilm/zproto,sappo/zproto,sappo/zproto,sappo/zproto,bkmit/zproto,vyskocilm/zproto,jdiez17/zproto,jdiez17/zproto,bkmit/zproto,jdiez17/zproto,hintjens/zproto,zeromq/zproto