chore: cleanup natTable's api

listener/shadowsocks/utils.go

@@ -7,7 +7,6 @@ import (
 	"net/url"
 
 	"github.com/Dreamacro/clash/common/pool"
-	C "github.com/Dreamacro/clash/constant"
 	"github.com/Dreamacro/clash/transport/socks5"
 )
 
@@ -45,13 +44,6 @@ func (c *packet) InAddr() net.Addr {
 	return c.pc.LocalAddr()
 }
 
-func (c *packet) SetNatTable(natTable C.NatTable) {
-	// no need
-}
-
-func (c *packet) SetUdpInChan(in chan<- C.PacketAdapter) {
-	// no need
-}
 func ParseSSURL(s string) (addr, cipher, password string, err error) {
 	u, err := url.Parse(s)
 	if err != nil {