tests: fix test that included specimen_id but doesn't need it

Author: dbirman

tests/test_metadata.py

@@ -906,7 +906,6 @@ def test_validate_subject_details_if_not_specimen(self):
         acquisition_with_details = Acquisition.model_construct(
             instrument_id="Test",
             subject_id="123456",
-            specimen_id="123456-001",
             data_streams=[],
             subject_details=AcquisitionSubjectDetails.model_construct(),
         )
@@ -917,6 +916,7 @@ def test_validate_subject_details_if_not_specimen(self):
             acquisition=acquisition_with_details,
         )
         self.assertIsNotNone(metadata_with_details)
+
         # Case where neither specimen_id nor subject_details is provided - should fail
         acquisition_missing_both = Acquisition.model_construct(
             subject_id="123456",