netstack/icmp: fix build breaking commit by bad bot

Author: ignoramous

intra/netstack/icmp.go

@@ -666,19 +666,6 @@ func l4l7(pkt *stack.PacketBuffer, sz uint32) ([]byte, error) {
 	din.Merge(&l7) // l4 + l7
 	return din.Flatten(), nil
 }
-// Fix for IPv6 reply function
-func (f *icmpForwarder) reply6(id stack.TransportEndpointID, pkt *stack.PacketBuffer) (handled bool) {
-    // ... existing code until line 173 ...
-    
-    // Fixed: Use correct protocol number and packet
-    err = route.WritePacket(stack.NetworkHeaderParams{
-        Protocol: header.ICMPv6ProtocolNumber,  // ✅ Fixed protocol
-        TTL:      route.DefaultTTL(),
-        TOS:      replyclass,
-    }, replyPkt)  // ✅ Use reply packet, not original
-    
-    // ... rest of function
-}
 
 func l3l4(pkt *stack.PacketBuffer, sz int64) (b buffer.Buffer, err error) {
     l3 := pkt.NetworkHeader().View()