Remove IGameInfoApi which was deprecated in 2.9

Author: YoshiRulz

src/BizHawk.Client.Common/Api/ApiContainer.cs

@@ -18,10 +18,6 @@ public IEmuClientApi EmuClient
 		public IEmulationApi Emulation
 			=> Get<IEmulationApi>(); // requires IEmulator
 
-		[Obsolete("use Emulation")]
-		public IGameInfoApi GameInfo
-			=> Get<IGameInfoApi>();
-
 		public IGuiApi Gui
 			=> Get<IGuiApi>(); // requires IEmulator