cheats - when a cheat is auto-removed, also remove it from the recent cheats list

src/BizHawk.Client.Common/tools/CheatList.cs

@@ -238,6 +238,7 @@ namespace BizHawk.Client.Common
 			else if (!_cheatList.Any() && !string.IsNullOrWhiteSpace(CurrentFileName))
 			{
 				new FileInfo(CurrentFileName).Delete();
+				Global.Config.RecentCheats.Remove(CurrentFileName);
 			}
 		}