Removed most call to raise_draw_event

These don't seem necessary anymore since draw handling happens per-frame and doesn't rely
on calling derived class's draw() member.

src/controller_base.cpp

@@ -246,7 +246,6 @@ void controller_base::play_slice(bool is_delay_enabled)
 
 	events::pump();
 	events::raise_process_event();
-	events::raise_draw_event();
 
 	// Update sound sources before scrolling
 	if(soundsource::manager* l = get_soundsource_man()) {