man bgpd.conf + question

Hello,
I have a syntax error with  announce none
group "spam-bgp" {
    remote-as           $spamASN
    multihop 64
    announce none

I was told recently that everything is filtered by default from 6.4 and read on Internet that announce none is deprecated
However man bgpd.conf (Openbsd 6.5) still has this command in section "NEIGHBORS AND GROUPS"announce (IPv4|IPv6) (none|unicast|vpn)

Do you know what is correct ?

Thank you