Remove splitscreen from engine and all the hacky shit that went along with it * Input config now handled in InputService instead of SplitScreenService * Remove split client connects / channels from networksystem * Remove all remaining references to CSplitScreenSlot Remove c++ engine camera manager from dota, we do cameras entirely in C# managed already anyway Delete c++ flashlight code Remove a bunch of vgui HUD stuff Delete achievements manager from C++, when we add achievements it'll be easier to do in C# with Steamworks Remove more unused convars specific to hl2, cs, etc. Restore host_writeconfig which was hidden away in splitscreen service 🥴 Drop `name` convar that was really just a wrapped steamworks GetFriendPersonaName() call - replace with a cached GetPersonaName()