remove Bootcamp (unmaintained since April 2020) (#3702)

- ref. #3558
- ref. https://github.com/vitorfs/bootcamp/issues/246

README.md

@@ -529,7 +529,6 @@ Simple deployment of [E-mail](https://en.wikipedia.org/wiki/Email) servers, e.g.
 - [Answer](https://answer.dev/) - An open-source knowledge-based community software. You can use it to quickly build your Q&A community for product technical support, customer support, user communication, and more. ([Source Code](https://github.com/answerdev/answer)) `Apache-2.0` `Docker/Go`
 - [AsmBB](https://board.asm32.info) - A fast, SQLite-powered forum engine written in ASM. ([Source Code](https://asm32.info/fossil/asmbb/index)) `EUPL-1.2` `Assembly`
 - [Bibliogram](https://bibliogram.art) `⚠` - An alternative front-end for Instagram. ([Source Code](https://sr.ht/~cadence/bibliogram/)) `AGPL-3.0` `Nodejs`
-- [Bootcamp](https://trybootcamp.vitorfs.com) - Enterprise social network. ([Source Code](https://github.com/vitorfs/bootcamp)) `MIT` `Python`
 - [Buddycloud](http://buddycloud.com/) - Tools, libraries, services and a community to build user-to-user, group and social messaging into your app. Saves time. Scales up. Supports you. ([Source Code](https://github.com/buddycloud)) `Apache-2.0` `Java`
 - [BuddyPress](https://buddypress.org/about/) - Powerful plugin that takes your WordPress.org powered site beyond the blog with social-network features like user profiles, activity streams, user groups, and more. ([Source Code](https://github.com/buddypress/BuddyPress)) `GPL-2.0` `PHP`
 - [Cactus Comments](https://cactus.chat/) - Cactus Comments is a federated comment system for the open web built on Matrix. ([Demo](https://cactus.chat/demo/), [Source Code](https://gitlab.com/cactus-comments/)) `GPL-3.0` `Python`