Remove a viewport with viewportID from the engine
If removing a viewport that is set to the primarySoundViewport,
the primarySoundViewport will automatically be set
to the first viewport in the viewportMap.
This renders the sector geometry and actors in the sector atPosition
This is handled by the engine's rendering loop
TODO: OUT OF DATE since not ever used
This will rotate all the keyframes' commands along with the actor so animation will stay oriented with the actor
This is normally called only internally by the engine (Actor as it rotates)