ENH: Removed last trace of ITK Smart Pointers from PixelContainer
ENH: Removed last trace of ITK Smart Pointers from PixelContainer

itk::simple::PixelContainer no longer subclasses itk::LightObject.

SimpleITK/Staging,SimpleITK/Staging,SimpleITK/Staging,SimpleITK/Staging,SimpleITK/Staging,SimpleITK/Staging,SimpleITK/Staging