message: Remove unnecessary check of IOU score in non_max_suppression.
diff: @@ -133,7 +133,6 @@ void DoNonMaxSuppressionOp(OpKernelContext* context, const Tensor& boxes,
  bool should_select = true;
  for (int j = selected.size() - 1; j >= 0; --j) {
  iou = IOU(boxes_data, next_candidate.box_index, selected[j]);
  - if (iou == 0.0) continue;
  if (iou > iou_threshold) should_select = false;
  }
  