test(clickhouse): revert test_literal_na disablement

Author: cpcloud

ibis/backends/tests/test_generic.py

@@ -18,7 +18,6 @@
 from ibis import _
 from ibis.backends.tests.errors import (
     ClickHouseDatabaseError,
-    ClickHouseInternalError,
     ExaQueryError,
     GoogleBadRequest,
     ImpalaHiveServer2Error,
@@ -1216,11 +1215,6 @@ def test_isin_uncorrelated_filter(
                 pytest.mark.notyet(
                     ["athena"], raises=PyAthenaOperationalError, reason="no time type"
                 ),
-                pytest.mark.notyet(
-                    ["clickhouse"],
-                    raises=ClickHouseInternalError,
-                    reason="Nullable(Time) is not supported",
-                ),
             ],
         ),
     ],