Remove unused imports (#3639)

torchvision/models/_utils.py

 from collections import OrderedDict
 
-import torch
 from torch import nn
 from typing import Dict
 

torchvision/ops/boxes.py

 import torch
 from torch import Tensor
-from typing import List, Tuple
+from typing import Tuple
 from ._box_convert import _box_cxcywh_to_xyxy, _box_xyxy_to_cxcywh, _box_xywh_to_xyxy, _box_xyxy_to_xywh
 import torchvision
 from torchvision.extension import _assert_has_ops

torchvision/transforms/functional_pil.py

@@ -3,7 +3,7 @@ from typing import Any, List, Sequence
 
 import numpy as np
 import torch
-from PIL import Image, ImageOps, ImageEnhance, ImageFilter, __version__ as PILLOW_VERSION
+from PIL import Image, ImageOps, ImageEnhance, __version__ as PILLOW_VERSION
 
 try:
     import accimage