Removed last remnants of VTK references.
Removed last remnants of VTK references.

ivoflipse/devide,fvpolpeta/devide,ivoflipse/devide,fvpolpeta/devide,zhangfangyan/devide,zhangfangyan/devide,chrisidefix/devide,nagyistoce/devide,nagyistoce/devide,chrisidefix/devide