Hysteria client: Fix sendThrough (#6063)

And fixes https://github.com/XTLS/Xray-core/issues/6046

transport/internet/sockopt_freebsd.go

@@ -222,32 +222,6 @@ func applyInboundSocketOptions(network string, fd uintptr, config *SocketConfig)
 	return nil
 }
 
-func bindAddr(fd uintptr, ip []byte, port uint32) error {
-	setReuseAddr(fd)
-	setReusePort(fd)
-
-	var sockaddr syscall.Sockaddr
-
-	switch len(ip) {
-	case net.IPv4len:
-		a4 := &syscall.SockaddrInet4{
-			Port: int(port),
-		}
-		copy(a4.Addr[:], ip)
-		sockaddr = a4
-	case net.IPv6len:
-		a6 := &syscall.SockaddrInet6{
-			Port: int(port),
-		}
-		copy(a6.Addr[:], ip)
-		sockaddr = a6
-	default:
-		return errors.New("unexpected length of ip")
-	}
-
-	return syscall.Bind(int(fd), sockaddr)
-}
-
 func setReuseAddr(fd uintptr) error {
 	if err := syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1); err != nil {
 		return errors.New("failed to set SO_REUSEADDR").Base(err).AtWarning()