SIENTIAPDE-1241: Simplify worker shutdown logic by removing conditional checks.

model_manager/worker/worker.py

@@ -152,10 +152,8 @@ async def main():
     except BaseException as e:  # noqa: BLE001
         logger.custom_error(f'An unhandled exception occurred: {e}', metadata)
     finally:
-        if notification_handler:
-            notification_handler.shutdown()
-        if activities:
-            await activities.shutdown()
+        notification_handler.shutdown()
+        await activities.shutdown()
         # Exit with a non-zero status code to indicate failure to Kubernetes
         metrics.APP_UP.labels(pod_id=POD_ID).set(0)  # Mark app as DOWN
         sys.exit(1)