Remove test as S3 does not support empty directories

Signed-off-by: James Hewitt <james.hewitt@uk.ibm.com>

registry/storage/driver/s3-aws/s3_test.go

@@ -205,39 +205,6 @@ func TestEmptyRootList(t *testing.T) {
 	}
 }
 
-// TestWalkEmptySubDirectory assures we list an empty sub directory only once when walking
-// through its parent directory.
-func TestWalkEmptySubDirectory(t *testing.T) {
-	if skipS3() != "" {
-		t.Skip(skipS3())
-	}
-
-	drv, err := s3DriverConstructor("", s3.StorageClassStandard)
-	if err != nil {
-		t.Fatalf("unexpected error creating rooted driver: %v", err)
-	}
-
-	// create an empty sub directory.
-	s3driver := drv.StorageDriver.(*driver)
-	if _, err := s3driver.S3.PutObject(&s3.PutObjectInput{
-		Bucket: aws.String(os.Getenv("S3_BUCKET")),
-		Key:    aws.String("/testdir/emptydir/"),
-	}); err != nil {
-		t.Fatalf("error creating empty directory: %s", err)
-	}
-
-	bucketFiles := []string{}
-	s3driver.Walk(context.Background(), "/testdir", func(fileInfo storagedriver.FileInfo) error {
-		bucketFiles = append(bucketFiles, fileInfo.Path())
-		return nil
-	})
-
-	expected := []string{"/testdir/emptydir"}
-	if !reflect.DeepEqual(bucketFiles, expected) {
-		t.Errorf("expecting files %+v, found %+v instead", expected, bucketFiles)
-	}
-}
-
 func TestStorageClass(t *testing.T) {
 	if skipS3() != "" {
 		t.Skip(skipS3())