Hi all, Recently I've opened up a PR <https://github.com/apache/incubator-airflow/pull/4421> to remove the KnownEvent and KnownEventType for Apache Airflow 2.0. My feeling was that not a lot of people are using this functionality, and therefore I would like to remove it to simplify the codebase. Are there any people on the mailing list which are actually using this functionality. Please let me know.
Cheers, Fokko
