#2736 - Fix up broken reward tests

src/primaite/simulator/system/applications/database_client.py

@@ -75,8 +75,6 @@ class DatabaseClient(Application, identifier="DatabaseClient"):
     server_password: Optional[str] = None
     _query_success_tracker: Dict[str, bool] = {}
     """Keep track of connections that were established or verified during this step. Used for rewards."""
-    last_query_response: Optional[Dict] = None
-    """Keep track of the latest query response. Used to determine rewards."""
     _server_connection_id: Optional[str] = None
     """Connection ID to the Database Server."""
     client_connections: Dict[str, DatabaseClientConnection] = {}