Dota 2 update for 9/23/19

Getting ready for some Midas Gaming tomorrow? Not so fast, because SteamDB has spotted an update for the game: https://steamdb.info/app/570/history/

Size is ~85 MB (with Workshop Tools installed). More info will be edited in when available.

• If the phone number you've linked for ranked matchmaking in-game differs from the one you've set for your Steam account (like through setting up Steam Guard Mobile Authentication), you'll now be warned to get that fixed up: "Your Dota linked phone number appears to be out of sync with Steam. Please associate your phone number with Dota."

• Some GC protobufs from The International 2019 (and older Internationals) have been put away now that the Battle Pass is a distant memory

• Otherwise, it's mostly cleanup of old stuff more than anything else