When was the option to sign in via a link sent to your email removed as a feature?

Title says it all, but on a similar note, these forums really need a site-meta discussion or an off topic one because when I have these sorts of questions I never know where to put them, and messaging a mod seems overkill. Seeing as I have hardly used this site of late I think this is an ok category.
This feature was how I always signed in and I quite liked it, for what reason was it removed?

You would have to ask the Discourse developers on their support forum at meta.discourse.org.

Thank you i didnt realize it was on the side of the software developers, and not a toggle or something similar that the admins have access too.

It’s also possible that the link you used to use got broken. Updates have been known to cause issues like that sometimes.