Different threading models aren't used anymore as SplittedThreadingModel
after all recent improvements works fine for all plugins tested so far.
It even shows that a lot more VST plugins are running now properly.
Therefore all support for TraditionalThreadingModel has been removed
which greatly simplifies code and makes it much more maintainable.
Signed-off-by: Tobias Doerffel <tobias.doerffel@gmail.com>