test: remove import case xfail mark after fix (#44086)

/kind improvement

Signed-off-by: zhuwenxing <wenxing.zhu@zilliz.com>

Author: zhuwenxing

tests/restful_client_v2/testcases/test_jobs_operation.py

@@ -1690,7 +1690,6 @@ def test_import_json_array_varchar_max_length_validation(self):
             if time.time() - t0 > IMPORT_TIMEOUT:
                 assert False, "Import job timeout"
 
-    @pytest.mark.xfail(reason="issue https://github.com/milvus-io/milvus/issues/43819")
     def test_import_parquet_array_float_nan_validation(self):
         """Test Parquet import with Array<Float> containing NaN - should fail"""
         name = gen_collection_name()