The aurora tree/part of the release cycle has gone away, but dev edition needs a separate update channel from beta, and was already using "aurora", so it was ob

The aurora tree/part of the release cycle has gone away, but dev edition needs a separate update channel from beta, and was already using "aurora", so it was obviously less work to keep the name around just for the channel rather than rename it (and that might have prevented keeping existing dev edition users getting updates) (So the _channel_ didn't actually ever go away, it just changed which tree it drew from) (Tree being synonymous with "code repository" throughout this comment)