chore: 删除子目录 README，仅保留根 README.md

user-center / user-home partial 目录说明文档移除，避免与主 README 重复。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

templates/parts/user-center/README.md

@@ -1,26 +0,0 @@
-<!-- 本人用户中心 partial 目录
-
-当前主路径：
-- 壳层：templates/pages/page-profile.php
-- 上下文：inc/helpers/aksrt-user-center.php
-  - aksrt_get_user_center_render_context()
-  - aksrt_user_center_resolve_tabs()
-  - aksrt_capture_user_center_view()  （profile → form 映射）
-- 挂载点：header / sidebar / mobile-tabs / panel / account-modals / runtime-config
-
-渲染器（inc/helpers/user-center-renderers/）：
-- profile-form.php → form-contacts.php
-- profile-posts.php → posts-status-filter.php + posts-list.php
-- profile-sidebar.php → sidebar-stats/nav/commerce.php
-- profile-credits.php → credits-balance/vip/signin/transactions.php
-- profile-settings.php → settings-bindings/security/invite/runtime-fields.php
-- profile-header / comments / favorites / account-modals
-
-样式归属：
-- assets/css/routes/user-center.css
-  - shell.css / credits.css / settings.css / responsive.css
-- assets/css/routes/profile.css — 共享头区/列表/弹窗
-
-脚本归属：
-- assets/js/routes/user-center.js
--->