chore: 清理 CI 配置，移除不必要的 .npmrc 修改步骤

.github/workflows/ci.yaml

@@ -13,12 +13,6 @@ jobs:
       - run: pnpm run build-only # 先 build，保证 components.d.ts 存在
       - run: pnpm run type-check
 
-      - run: cat .npmrc
-      - name: 修改 .npmrc
-        run: |
-          sed -i '/use-node-version/d' .npmrc;
-          sed -i '/node-mirror/d' .npmrc;
-
       # https://github.com/vercel/examples/tree/main/ci-cd/github-actions
       # cname-cn.vercel.com cname-china.vercel-dns.com
       - name: 拉取 Vercel 环境信息