remove trivial IPv4 helper function (#4591)

internal/utils/ip.go

@@ -1,10 +0,0 @@
-package utils
-
-import "net"
-
-func IsIPv4(ip net.IP) bool {
-	// If ip is not an IPv4 address, To4 returns nil.
-	// Note that there might be some corner cases, where this is not correct.
-	// See https://stackoverflow.com/questions/22751035/golang-distinguish-ipv4-ipv6.
-	return ip.To4() != nil
-}

internal/utils/ip_test.go

@@ -1,17 +0,0 @@
-package utils
-
-import (
-	"net"
-
-	. "github.com/onsi/ginkgo/v2"
-	. "github.com/onsi/gomega"
-)
-
-var _ = Describe("IP", func() {
-	It("tells IPv4 and IPv6 addresses apart", func() {
-		Expect(IsIPv4(net.IPv4(127, 0, 0, 1))).To(BeTrue())
-		Expect(IsIPv4(net.IPv4zero)).To(BeTrue())
-		Expect(IsIPv4(net.IPv6zero)).To(BeFalse())
-		Expect(IsIPv4(net.IPv6loopback)).To(BeFalse())
-	})
-})