fix(postgres): remove redundant tz factory (#17713)
fix(postgres): remove redundant tz factory (#17713)

* fix(postgres): remove redundant tz factory

* lint
airbnb/caravel,zhouyao1994/incubator-superset,airbnb/caravel,apache/incubator-superset,airbnb/caravel,zhouyao1994/incubator-superset,zhouyao1994/incubator-superset,apache/incubator-superset,airbnb/caravel,apache/incubator-superset,apache/incubator-superset,zhouyao1994/incubator-superset,apache/incubator-superset,zhouyao1994/incubator-superset