remove ZeroNet (unmaintained since 2021) (#3783)

- WARNING:awesome_lint.py: ZeroNet: last updated -830 days, 12:18:06.170177 ago, older than 365 days
- ref. https://github.com/awesome-selfhosted/awesome-selfhosted/issues/3558

README.md

@@ -375,7 +375,6 @@ _See also: [Comparison of CalDAV and CardDAV implementations - Wikipedia](https:
 - [Typebot](https://typebot.io) - Typebot is a conversational app builder as an alternative to Typeform or Landbot. ([Source Code](https://github.com/baptisteArno/typebot.io)) `AGPL-3.0` `Docker`
 - [WBO](https://github.com/lovasoa/whitebophir) - Web Whiteboard to collaborate in real-time on schemas, drawings, and notes. ([Demo](https://wbo.ophir.dev/)) `AGPL-3.0` `Nodejs/Docker`
 - [Yopass](https://github.com/jhaals/yopass) - Secure sharing of secrets, passwords and files. ([Demo](https://yopass.se/)) `Apache-2.0` `Go`
-- [ZeroNet](https://zeronet.io/) `⚠` - Open, free, and uncensorable websites, using Bitcoin cryptography and BitTorrent network. ([Source Code](https://github.com/HelloZeroNet/ZeroNet)) `GPL-2.0` `Python`
 - [Zulip](https://zulip.org) - Zulip is a powerful, open source group chat application. ([Source Code](https://github.com/zulip/zulip)) `Apache-2.0` `Python`