📝 Remove instructions for Heroku.

fuck it.

README.md

@@ -88,8 +88,6 @@
 
 ## 部署指南
 
-[![Deploy to Heroku](https://www.herokucdn.com/deploy/button.svg)](https://heroku.com/deploy)
-
 - 手动部署指南: **[点击此处查看](https://github.com/mixmoe/HibiAPI/wiki/Deployment)**
 
 ## 应用实例
@@ -103,19 +101,12 @@
 - 公开搭建实例
   | **站点名称** | **网址** | **状态** |
   | :--------------------------: | :-----------------------------: | :---------------------: |
-  | **官方 Demo[^3]** | <https://api.obfs.dev> | [![official][official]][official-stats] |
-  | 轻零 API | <https://hibiapi.lite0.com> | ![lite0][lite0] |
-  | Kyomotoi の菜几服务 | <https://api.kyomotoi.moe> | ![kyo][kyo] |
-  | 老狐狸 API | <https://hibiapi.aliserver.net> | ![older-fox][older-fox] |
+  | **官方 Demo[^3]** | <https://api.obfs.dev> | ![official][official] |
   | [MyCard](https://mycard.moe) | <https://hibi.moecube.com> | ![mycard][mycard] |
 
 [^3]: 为了减轻服务器负担, Demo 服务器已开启了 Cloudflare 全站缓存, 如果有实时获取更新的需求, 请自行搭建或使用其他部署实例
 
 [official]: https://img.shields.io/website?url=https%3A%2F%2Fapi.obfs.dev%2Fopenapi.json
-[official-stats]: https://metrics.librato.com/s/public/g1hepph3j
-[lite0]: https://img.shields.io/website?url=https%3A%2F%2Fhibiapi.lite0.com%2Fopenapi.json
-[kyo]: https://img.shields.io/website?url=https%3A%2F%2Fapi.kyomotoi.moe%2Fopenapi.json
-[older-fox]: https://img.shields.io/website?url=https%3A%2F%2Fhibiapi.aliserver.net%2Fopenapi.json
 [mycard]: https://img.shields.io/website?url=https%3A%2F%2Fhibi.moecube.com%2Fopenapi.json
 
 ## 特别鸣谢