Test: Update test cases for PR #6643 (#6766)

### What problem does this PR solve?

Update test cases for PR #6643 issue #6607

### Type of change

- [x] update test cases

sdk/python/test/test_http_api/test_chunk_management_within_dataset/test_delete_chunks.py

             ),
             (lambda r: {"chunk_ids": r[:1]}, 0, "", 4),
             (lambda r: {"chunk_ids": r}, 0, "", 1),
-            pytest.param({"chunk_ids": []}, 0, "deleted 5 chunks", 0)
-
+            ({"chunk_ids": []}, 0, "", 0),
         ],
     )
     def test_basic_scenarios(