remove Hapttic (unmaintained since 2019) (#3563)

- `WARNING:awesome_lint.py: Hapttic: last updated -1431 days, 9:53:39.980304 ago, older than 365 days`
- ref. https://github.com/awesome-selfhosted/awesome-selfhosted/issues/3558

README.md

@@ -1749,7 +1749,6 @@ Software for easy installation, management and configuration of self-hosted serv
 - [DreamFactory](https://www.dreamfactory.com/) - Turns any SQL/NoSQL/Structured data into Restful API. ([Source Code](https://github.com/dreamfactorysoftware/dreamfactory)) `Apache-2.0` `PHP`
 - [form.io](https://form.io) - A REST API building platform that utilizes a drag & drop form builder, and is application framework agnostic. Contains open source and enterprise version. ([Demo](https://portal.form.io), [Source Code](https://github.com/formio)) `MIT` `Nodejs`
 - [Fusio](https://www.fusio-project.org/) - Open-source API management platform which helps to build and manage REST APIs. ([Demo](https://fusio-project.org/demo), [Source Code](https://github.com/apioo/fusio)) `AGPL-3.0` `PHP`
-- [Hapttic](https://github.com/jsoendermann/hapttic) - Simple HTTP server that forwards all requests to a shell script to handle webhooks you receive. `Apache-2.0` `Go`
 - [Hasura](https://hasura.io) - Fast, instant realtime GraphQL APIs on Postgres with fine grained access control, also trigger webhooks on database events. ([Source Code](https://github.com/hasura/graphql-engine)) `Apache-2.0` `Haskell`
 - [Hoppscotch](https://hoppscotch.io) - A free, fast and beautiful API request builder. ([Source Code](https://github.com/hoppscotch/hoppscotch)) `MIT` `Nodejs/Vue/Nuxt`
 - [Kong](https://konghq.com/kong/) - The World’s Most Popular Open Source Microservice API Gateway and Platform. ([Source Code](https://github.com/Kong/kong)) `Apache-2.0` `Lua`