message: fix a build issue found in a downstream TF project
diff: @@ -469,7 +469,6 @@ class MklDnnShape {
  } else {
  auto format_tag =
  MklTensorFormatToMklDnnDataFormat(data_.tf_data_format_);
  - DCHECK_NE(format_tag, memory::format_tag::undef);
  return memory::desc(dims, data_.T_, format_tag);
  }
  }
  