fix preventing the response from being displayed.

app.py

@@ -396,9 +396,6 @@ async def stream_agent_response(question: str, chat_history: List) -> List[Dict]
             error_msg = f"Error al ejecutar el agente: {str(e)}"
             logger.error(error_msg, exc_info=True)
             assistant_message["content"] = f"## ❌ Error\n\n{error_msg}"
-            
-        else:
-            assistant_message["content"] = "Error: No se recibió respuesta del agente."
         
         # Return the assistant's message
         return [assistant_message]