The addon at https://github.com/nuxeo/nuxeo-realtime-edit should be deprecated because etherpad integration is not ready/maintained.
It relies on Nuxeo 5.9.1-SNAPSHOT so the deprecation comment should state that is is deprecated as of 5.8.
The corresponding market place package at https://github.com/nuxeo/marketplace-realtime-editor should be removed too.
- empty the repository content on the master branch (only keeping the .gitignore file)
- add a DEPRECATED.txt file at the root, stating the deprecating and since version (like at https://github.com/nuxeo/nuxeo-flavors)
- remove the corresponding Jenkins job