From 21481a3c52acd269366cd242c56e84a44c19b685 Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Thu, 24 Aug 2023 12:03:08 +0200
Subject: [PATCH] net: remove unused ipv4AddrToInterface

It's unused since CL 6497044.

Change-Id: Iee07e7af7b80fc3f00146b64cebead844daee087
Reviewed-on: https://go-review.googlesource.com/c/go/+/522196
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
---
 src/net/sockopt_posix.go | 29 -----------------------------
 1 file changed, 29 deletions(-)

diff --git a/src/net/sockopt_posix.go b/src/net/sockopt_posix.go
index 32e8fcd5055..a380c7719b4 100644
--- a/src/net/sockopt_posix.go
+++ b/src/net/sockopt_posix.go
@@ -20,35 +20,6 @@ func boolint(b bool) int {
 	return 0
 }
 
-func ipv4AddrToInterface(ip IP) (*Interface, error) {
-	ift, err := Interfaces()
-	if err != nil {
-		return nil, err
-	}
-	for _, ifi := range ift {
-		ifat, err := ifi.Addrs()
-		if err != nil {
-			return nil, err
-		}
-		for _, ifa := range ifat {
-			switch v := ifa.(type) {
-			case *IPAddr:
-				if ip.Equal(v.IP) {
-					return &ifi, nil
-				}
-			case *IPNet:
-				if ip.Equal(v.IP) {
-					return &ifi, nil
-				}
-			}
-		}
-	}
-	if ip.Equal(IPv4zero) {
-		return nil, nil
-	}
-	return nil, errNoSuchInterface
-}
-
 func interfaceToIPv4Addr(ifi *Interface) (IP, error) {
 	if ifi == nil {
 		return IPv4zero, nil