chore: 移除 README 中关于旧版文档的说明，以简化文档结构

README.md

@@ -8,7 +8,6 @@
 ## 文档索引
 - [English README](README_en.md)
 - [简明上手指南（零基础）](simple-readme.md)
-- `legacy/docs/`：旧版策略与架构说明
 
 ## 项目亮点
 - **实时行情与风控**：Websocket + REST 自动同步账户、挂单与仓位。

README_en.md

@@ -5,7 +5,6 @@ A Bun-powered trading workstation for Aster perpetual contracts that ships two p
 ## Documentation Map
 - [中文 README](README.md)
 - [Beginner-friendly Quick Start](simple-readme.md)
-- `legacy/docs/`: in-depth architecture notes for the historical workspace
 
 ## Highlights
 - **Live market data & risk sync** via websocket feeds with REST fallbacks, full reconciliation on restart.