unused import [1/n] (#3412)

Summary:
Pull Request resolved: #3412

https://www.flake8rules.com/rules/F401.html

Reviewed By: TroyGarden

Differential Revision: D83737895

fbshipit-source-id: 2ebe5f0200224804506d73536100a4c5c75260e4

Author: aliafzal

torchrec/distributed/sharding/tw_sharding.py

@@ -7,7 +7,7 @@
 
 # pyre-strict
 
-from typing import Any, Callable, cast, Dict, List, Optional, TypeVar, Union
+from typing import Any, Callable, cast, Dict, List, Optional, TypeVar
 
 import torch
 import torch.distributed as dist

torchrec/metrics/metric_module.py

@@ -13,7 +13,7 @@
 import logging
 import time
 from collections import defaultdict
-from typing import Any, Dict, List, Optional, Sequence, Type, TypeVar, Union
+from typing import Any, Dict, List, Optional, Type, TypeVar, Union
 
 import torch
 import torch.distributed as dist

torchrec/modules/mc_adapter.py

@@ -6,8 +6,7 @@
 # LICENSE file in the root directory of this source tree.
 
 # pyre-strict
-import sys
-from typing import Dict, Iterator, List, Optional, Union
+from typing import Dict, Iterator, List, Optional
 
 import torch
 import torch.nn as nn
@@ -29,7 +28,6 @@
 from torchrec.modules.mc_modules import (
     DistanceLFU_EvictionPolicy,
     ManagedCollisionCollection,
-    ManagedCollisionModule,
     MCHManagedCollisionModule,
 )
 from torchrec.sparse.jagged_tensor import JaggedTensor, KeyedJaggedTensor