fix: remove duplicate local imports causing isort errors

OptionalImportError and logging were imported both at module level and
again inside the test_unspecified_reader_falls_back_silently() method.

Remove the duplicate local imports since they're already available at the
module level (where we moved them earlier per MONAI style). Keep the local
import of SUPPORTED_READERS since it's only needed in this one test method.

This fixes isort formatting check failure.

Signed-off-by: Cipher <cipher@openclaw.ai>

Author: Cipher

tests/transforms/test_load_image.py

@@ -528,10 +528,6 @@ def test_unspecified_reader_falls_back_silently(self):
         # Force the fallback path by simulating missing optional dependencies.
         # Patch the constructor to raise OptionalImportError for some readers,
         # then verify LoadImage still instantiates and logs warnings.
-        from monai.utils import OptionalImportError
-
-        # Patch SUPPORTED_READERS entries to raise OptionalImportError
-        # This simulates optional packages not being installed
         from monai.transforms.io.array import SUPPORTED_READERS
 
         # Patch a few readers to fail (e.g., ITKReader)