syscall: remove unused kernelVersion function from tests

Change-Id: If0d00999c58f7421e4da06e1822ba5abccf72cac
Reviewed-on: https://go-review.googlesource.com/14111Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/syscall/exec_linux_test.go

@@ -10,8 +10,6 @@ import (
 	"io/ioutil"
 	"os"
 	"os/exec"
-	"regexp"
-	"strconv"
 	"strings"
 	"syscall"
 	"testing"
@@ -72,22 +70,6 @@ func TestCloneNEWUSERAndRemapRootEnableSetgroups(t *testing.T) {
 	testNEWUSERRemap(t, 0, 0, false)
 }
 
-// kernelVersion returns the major and minor versions of the Linux
-// kernel version.  It calls t.Skip if it can't figure it out.
-func kernelVersion(t *testing.T) (int, int) {
-	bytes, err := ioutil.ReadFile("/proc/version")
-	if err != nil {
-		t.Skipf("can't get kernel version: %v", err)
-	}
-	matches := regexp.MustCompile("([0-9]+).([0-9]+)").FindSubmatch(bytes)
-	if len(matches) < 3 {
-		t.Skipf("can't get kernel version from %s", bytes)
-	}
-	major, _ := strconv.Atoi(string(matches[1]))
-	minor, _ := strconv.Atoi(string(matches[2]))
-	return major, minor
-}
-
 func TestCloneNEWUSERAndRemapNoRootDisableSetgroups(t *testing.T) {
 	if os.Getuid() == 0 {
 		t.Skip("skipping unprivileged user only test")