You mean: Nheko (Reborn) - Matrix Chat Client - #3 by Patrick
https://www.whonix.org/w/index.php?title=Chat&oldid=59733#Nheko
Yeah, occasionally links to wiki diffs or historic versions are posted in context of documentation / development discussions. But this is not what users find when navigating on the page homepage → documentation → chat. Does not show up there. Neither shows up on search engines.
Users reading discussions on development, documentation should be clever enough to not read stuff from the history and use that for up-to-date documentation.
Edited that post just now as I guess it doesn’t matter much nowadays.
But also seems wrong, excessive to go through all the forums and wipe any mentions of that domain name, from changelogs, etc.