Automatically delete downloaded models after successful tests to avoi…

…d OOM

tests/conftest.py

@@ -1,6 +1,7 @@
 # Copyright (c) Microsoft Corporation. All rights reserved.
 # Licensed under the MIT License.
 
+from pathlib import Path
 from typing import Any
 
 import pytest
@@ -16,3 +17,8 @@ def load(*args: Any, progress: bool = False, **kwargs: Any) -> Any:
 @pytest.fixture
 def load_state_dict_from_url(monkeypatch: MonkeyPatch) -> None:
     monkeypatch.setattr(torchvision.models._api, 'load_state_dict_from_url', load)
+
+
+@pytest.fixture(autouse=True)
+def torch_hub(tmp_path: Path) -> None:
+    torch.hub.set_dir(tmp_path)