1ce50faf02
Fixes https://github.com/scylladb/scylladb/issues/13578 Now that the documentation is versioned, we can remove the .. versionadded:: and .. versionchanged:: information (especially that the latter is hard to maintain and now outdated), as well as the outdated information about experimental features in very old releases. This commit removes that information and nothing else. Closes #13680
