go/neo/neonet: Kill pktBuf.Dump

It is not used anywhere and would have to be reworked with upcoming
introduction of msgpack encoding. -> Simply remove that.

go/neo/neonet/pkt.go

@@ -112,15 +112,3 @@ func (pkt *pktBuf) String() string {
 
 	return s
 }
-
-// Dump dumps a packet in raw form.
-func (pkt *pktBuf) Dump() string {
-	if len(pkt.data) < proto.PktHeaderLen {
-		return fmt.Sprintf("(! < pktHeaderLen) % x", pkt.data)
-	}
-
-	h := pkt.Header()
-	data := pkt.Payload()
-	return fmt.Sprintf(".%d (%d) #%d [%d]: % x",
-		packed.Ntoh32(h.ConnId), packed.Ntoh16(h.MsgCode), packed.Ntoh32(h.MsgLen), len(data), data)
-}