Remove unused fields and comments.

Signed-off-by: Lantao Liu <lantaol@google.com>

pkg/server/container_create_test.go

@@ -467,7 +467,6 @@ func TestCreateContainer(t *testing.T) {
 		imageMetadataErr   bool
 		prepareSnapshotErr error
 		createRootDirErr   error
-		createMetadataErr  bool
 		expectErr          bool
 		expectMeta         *metadata.ContainerMetadata
 	}{

pkg/server/version_test.go

@@ -33,12 +33,10 @@ import (
 func TestVersion(t *testing.T) {
 	ctrl := gomock.NewController(t)
 	defer ctrl.Finish()
-	// TODO(random-liu): Check containerd version after containerd fixes its version.
 	for desc, test := range map[string]struct {
 		versionRes *versionapi.VersionResponse
 		versionErr error
 		expectErr  bool
-		expectedVersion string
 	}{
 		"should return error if containerd version returns error": {
 			versionErr: errors.New("random error"),