diff --git a/transport/internet/finalmask/finalmask.go b/transport/internet/finalmask/finalmask.go
index 7c6565b72..a64d4183a 100644
--- a/transport/internet/finalmask/finalmask.go
+++ b/transport/internet/finalmask/finalmask.go
@@ -272,8 +272,6 @@ const (
 	UDPSize = 4096
 )
 
-
-
 type headerManagerConn struct {
 	net.PacketConn