[FIX] Test postgres

tests/test_postgres.py

@@ -42,28 +42,6 @@ def _get_db_service_name(dc: DockerClient) -> str:
     return "db"
 
 
-def _get_db_service_name(dc: DockerClient) -> str:
-    """
-    Use python-on-whales to retrieve the final Compose configuration
-    and return the DB service name that ends with '-db'. Fallback to
-    any service containing 'db' or 'postgres'. Finally, fallback to 'db'.
-    """
-    config_data = dc.compose.config()  # Returns a dict with { "services": {...}, ... }
-    services_dict = config_data["services"]
-    # First pass: Look for a service name that exactly ends with '-db'
-    for svc_name in services_dict:
-        if svc_name.lower().endswith("-db"):
-            return svc_name
-
-    # Second pass: Fallback to any name containing 'db' or 'postgres'
-    for svc_name in services_dict:
-        if "postgres" in svc_name.lower() or "db" in svc_name.lower():
-            return svc_name
-
-    # Final fallback
-    return "db"
-
-
 @pytest.mark.parametrize("dbver", ("oldest", "latest"))
 def test_postgresql_client_versions(
     cloned_template: Path,