Remove I3DEngine CryCommon Interface (#567)

Delete:

- I3DEngine
- Missions
- Time of day
- GameEffectsSystem Gem
- ImageProcessing Gem
- SVOGI Gem
- Various other things that don't do anything now that the legacy renderer has been removed.

Code/CryEngine/CrySystem/VisRegTest.cpp

@@ -18,7 +18,6 @@
 #include "VisRegTest.h"
 
 #include "ISystem.h"
-#include "I3DEngine.h"
 #include "IRenderer.h"
 #include "IConsole.h"
 #include "ITimer.h"