remove WebODF (unmaintained since 2020) (#3749)

- ref. https://github.com/awesome-selfhosted/awesome-selfhosted/issues/3558
- WARNING:awesome_lint.py: WebODF: last updated -1171 days, 5:54:10.912547 ago, older than 365 days

README.md

@@ -1461,7 +1461,6 @@ An [office suite](https://en.wikipedia.org/wiki/List_of_office_suites) is a coll
 - [ONLYOFFICE](https://helpcenter.onlyoffice.com/faq/server-opensource.aspx) - Office suite that enables you to manage documents, projects, team and customer relations in one place. ([Source Code](https://github.com/ONLYOFFICE/DocumentServer)) `AGPL-3.0` `Nodejs`
 - [PHPOffice](https://github.com/PHPOffice) - PHPOffice contains libraries which permits to write and read files from most office suites. `LGPL-3.0` `PHP`
 - [Rustpad](https://rustpad.io/) - Efficient and minimal collaborative code editor, self-hosted, no database required. ([Source Code](https://github.com/ekzhang/rustpad)) `MIT` `Rust`
-- [WebODF](https://webodf.org/) - Tools and libraries to view and edit Open Document Format (ODF) files. ([Source Code](https://github.com/webodf/WebODF)) `AGPL-3.0` `HTML5`
 
 
 ### Password Managers