Minor deprecation warning: removing `members` in spaceOverwrites

I’m not sure when it slipped in but spaceOverwrites was never meant to have the space members in it. There’s a separate event for that, spaceSetsSpaceMembers. this one is just supposed to have the space settings and the moderator list (for now)

So, we’re removing members from that event, should go live in 11 days.

normally this isn’t how we would deprecate things at all, you’d get a warning from the game server when you connected (before it just stopped working), but this one is so minor, and afaik unused, that I didn’t want to go through the hassle