Revert ignore duckdb test (#1927)

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# Rationale for this change
Issue is fixed upstream,
duckdb/duckdb-iceberg#185

This reverts commit eb8756a. (#1918)

# Are these changes tested?

# Are there any user-facing changes?

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Author: kevinjqliu

tests/integration/test_writes/test_writes.py

@@ -780,7 +780,6 @@ def test_summaries_with_only_nulls(
 
 
 @pytest.mark.integration
-@pytest.mark.skip(reason="Reported the issue: https://github.com/duckdb/duckdb-iceberg/issues/185")
 def test_duckdb_url_import(warehouse: Path, arrow_table_with_null: pa.Table) -> None:
     os.environ["TZ"] = "Etc/UTC"
     time.tzset()