remove old dispose hack in MovieSession

no longer relevant since recent commits and didn't fail since the TasStateManager changes a while back anyway

src/BizHawk.Client.Common/movie/MovieSession.cs

@@ -285,8 +285,7 @@ namespace BizHawk.Client.Common
 				_modeChangedCallback();
 			}
 
-			if (Movie is IDisposable d
-				&& Movie != _queuedMovie) // Uberhack, remove this and Loading Tastudio with a bk2 already loaded breaks, probably other TAStudio scenarios as well
+			if (Movie is IDisposable d)
 			{
 				d.Dispose();
 			}