message: Unbreak draw_bounding_box_op_test.
  Removes the forwards compatibility guard on the new implementation. The logic
  in the guard was written incorrectly, and broke the case where `colors` is not
  specified when the window ended.
diff: @@ -3650,7 +3650,7 @@ def draw_bounding_boxes_v2(images, boxes, colors, name=None):
  Returns:
  A `Tensor`. Has the same type as `images`.
  """
  - if colors is None and not compat.forward_compatible(2019, 5, 1):
  + if colors is None:
  return gen_image_ops.draw_bounding_boxes(images, boxes, name)
  return gen_image_ops.draw_bounding_boxes_v2(images, boxes, colors, name)
  