chore: remove Linux support to simplify project

Drop Linux startup script and all Linux references from README.
Only Mac + Windows supported going forward.

README.md

@@ -28,7 +28,7 @@
 
 ## Features / 特性
 
-- 🚀 **Easy startup / 快速启动** — macOS + Linux + Windows, ready to run from USB
+- 🚀 **Easy startup / 快速启动** — macOS + Windows, ready to run from USB
 - 📦 **Fully offline / 完全离线** — No internet needed for installation
 - 💸 **Lower TCO / 总成本更低** — For repeated deployments, often cheaper than cloud-only rollout
 - 🇨🇳 **China-optimized / 中国优化** — 8 Chinese AI models (DeepSeek, Kimi, Qwen, GLM, MiniMax, Doubao, Qianfan, Mimo)
@@ -47,7 +47,6 @@
 
 # After extracting / 解压后：
 # Mac: double-click "Mac-从U盘启动.command"
-# Linux: bash ./Linux-从U盘启动.sh
 # Win: double-click "Windows-从U盘启动.bat"
 ```
 
@@ -87,7 +86,6 @@ U-Claw/                            (~1.3GB, 8GB USB minimum)
 │
 ├── Mac-从U盘启动.command             ← macOS: run from USB
 ├── Windows-从U盘启动.bat            ← Windows: run from USB
-├── Linux-从U盘启动.sh               ← Linux: run from USB
 ├── Mac-全部功能.command              ← macOS: full feature menu
 ├── Windows-全部功能.bat             ← Windows: full feature menu
 ├── Mac-安装到电脑.command            ← Install to Mac permanently
@@ -99,7 +97,6 @@ U-Claw/                            (~1.3GB, 8GB USB minimum)
 ├── runtime/                        ← Node.js 22 runtimes
 │   ├── node-mac-arm64/             ← Mac Apple Silicon (M1-M4)
 │   ├── node-mac-x64/               ← Mac Intel
-│   ├── node-linux-x64/             ← Linux x64
 │   └── node-win-x64/               ← Windows 64-bit
 │
 ├── openclaw/                       ← OpenClaw + node_modules + dist
@@ -197,7 +194,6 @@ openclaw config set channels.qqbot.allowFrom "your_qq_number"
 ## System Requirements / 系统要求
 
 - **macOS**: 12+ (Intel or Apple Silicon)
-- **Linux**: x64 with glibc and bash
 - **Windows**: 10/11 (64-bit)
 - **RAM**: 2GB+ (4GB+ recommended)
 - **USB**: 8GB+ (16GB recommended)
@@ -212,7 +208,7 @@ openclaw config set channels.qqbot.allowFrom "your_qq_number"
 
 ### What the build script does / 构建脚本做了什么
 
-1. Downloads Node.js 22 for 4 platforms (Mac ARM64 + Mac x64 + Linux x64 + Win x64), prefers China mirror
+1. Downloads Node.js 22 for 3 platforms (Mac ARM64 + Mac x64 + Win x64), prefers China mirror
 2. Copies OpenClaw source to `U-Claw/openclaw/`
 3. Installs `pnpm` and runs `pnpm install` with China mirror (registry.npmmirror.com)
 4. Runs `pnpm build` to build OpenClaw
@@ -271,10 +267,6 @@ A: Yes, unlimited. MIT license, copy freely.
 A: No. U-Claw bundles Windows Node.js, runs natively via `.bat`.
 不需要。自带 Windows 版 Node.js。
 
-**Q: Linux supported? / Linux 支持吗？**
-A: Yes for x64 Linux. Use `bash ./运行.sh` from the release bundle.
-支持，面向 x64 Linux。解压后运行 `bash ./运行.sh` 即可。
-
 ## License
 
 [MIT](LICENSE) — Free to use, modify, distribute.