Correct docstring and delete unused code in `scale_image` function (#4001)

ultralytics/utils/ops.py

@@ -321,7 +321,7 @@ def scale_image(masks, im0_shape, ratio_pad=None):
     Takes a mask, and resizes it to the original image size
 
     Args:
-      masks (torch.Tensor): resized and padded masks/images, [h, w, num]/[h, w, 3].
+      masks (np.ndarray): resized and padded masks/images, [h, w, num]/[h, w, 3].
       im0_shape (tuple): the original image shape
       ratio_pad (tuple): the ratio of the padding to the original image.
 
@@ -344,9 +344,6 @@ def scale_image(masks, im0_shape, ratio_pad=None):
     if len(masks.shape) < 2:
         raise ValueError(f'"len of masks shape" should be 2 or 3, but got {len(masks.shape)}')
     masks = masks[top:bottom, left:right]
-    # masks = masks.permute(2, 0, 1).contiguous()
-    # masks = F.interpolate(masks[None], im0_shape[:2], mode='bilinear', align_corners=False)[0]
-    # masks = masks.permute(1, 2, 0).contiguous()
     masks = cv2.resize(masks, (im0_shape[1], im0_shape[0]))
     if len(masks.shape) == 2:
         masks = masks[:, :, None]