bpo-40443: Remove unused imports in stdlib (GH-19815)

diff --git a/Lib/importlib/resources.py b/Lib/importlib/resources.py
index fc3a1c9..f518865 100644
--- a/Lib/importlib/resources.py
+++ b/Lib/importlib/resources.py
@@ -8,10 +8,9 @@
 from io import BytesIO, TextIOWrapper
 from pathlib import Path
 from types import ModuleType
-from typing import Iterable, Iterator, Optional, Set, Union   # noqa: F401
+from typing import Iterable, Iterator, Optional, Union   # noqa: F401
 from typing import cast
 from typing.io import BinaryIO, TextIO
-from zipimport import ZipImportError
 
 
 __all__ = [