Revert "story-kit: merge 86_story_show_live_activity_status_instead_of_static_thinking_indicator_in_chat"

This reverts commit ef162d91ff.

server/src/http/ws.rs

@@ -247,7 +247,6 @@ pub async fn ws_handler(ws: WebSocket, ctx: Data<&Arc<AppContext>>) -> impl poem
                                 tool_name: tool_name.to_string(),
                             });
                         },
-                        Some(perm_tx),
                     );
                     tokio::pin!(chat_fut);