移除rest未使用mut的警告

strategy/src/bybit_usdt_swap.rs

@@ -35,7 +35,7 @@ pub(crate) async fn reference_bybit_swap_run(is_shutdown_arc: Arc<AtomicBool>,
 
         // 读取数据
         let core_arc_clone = Arc::clone(&core_arc);
-        let mut rest = core_arc_clone.lock().await.platform_rest.clone_box();
+        let rest = core_arc_clone.lock().await.platform_rest.clone_box();
         let multiplier = rest.get_self_market().multiplier;
         // let mut records = rest.get_record("1".to_string()).await.unwrap();
         // for record in records.iter_mut() {