Refs #33308 -- Ensured type handlers are registered for all PostgreSQL specific tests.

Co-authored-by: Mariusz Felisiak <felisiak.mariusz@gmail.com>

tests/postgres_tests/test_introspection.py

@@ -1,12 +1,10 @@
 from io import StringIO
 
 from django.core.management import call_command
-from django.test.utils import modify_settings
 
 from . import PostgreSQLTestCase
 
 
-@modify_settings(INSTALLED_APPS={"append": "django.contrib.postgres"})
 class InspectDBTests(PostgreSQLTestCase):
     def assertFieldsInModel(self, model, field_outputs):
         out = StringIO()