Because discussion dropped to a level below which we expect it won't be in the way of other discussion, so the temporary forum was dissolved.
From this point, I would expect to see most of that discussion in the respective "Homebrews" forums - if you want a warlord, you can do there to talk about making them. If you don't want a warlord, then you shouldn't need to pay much attention.
Trying to make a big stink about what WotC should or should not do about warlords... not likely to see much action... or patience, at this point.