Update integration test to support windows

Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>

testutil/helpers.go

@@ -2,15 +2,11 @@ package testutil
 
 import (
 	"flag"
-	"fmt"
 	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strconv"
 	"testing"
-
-	"github.com/containerd/containerd/mount"
-	"github.com/stretchr/testify/assert"
 )
 
 var rootEnabled bool
@@ -19,36 +15,6 @@ func init() {
 	flag.BoolVar(&rootEnabled, "test.root", false, "enable tests that require root")
 }
 
-// Unmount unmounts a given mountPoint and sets t.Error if it fails
-func Unmount(t *testing.T, mountPoint string) {
-	t.Log("unmount", mountPoint)
-	if err := mount.Unmount(mountPoint, 0); err != nil {
-		t.Error("Could not umount", mountPoint, err)
-	}
-}
-
-// RequiresRoot skips tests that require root, unless the test.root flag has
-// been set
-func RequiresRoot(t testing.TB) {
-	if !rootEnabled {
-		t.Skip("skipping test that requires root")
-		return
-	}
-	assert.Equal(t, 0, os.Getuid(), "This test must be run as root.")
-}
-
-// RequiresRootM is similar to RequiresRoot but intended to be called from *testing.M.
-func RequiresRootM() {
-	if !rootEnabled {
-		fmt.Fprintln(os.Stderr, "skipping test that requires root")
-		os.Exit(0)
-	}
-	if 0 != os.Getuid() {
-		fmt.Fprintln(os.Stderr, "This test must be run as root.")
-		os.Exit(1)
-	}
-}
-
 // DumpDir will log out all of the contents of the provided directory to
 // testing logger.
 //