[Paraview] Animating simple legacy formats files

[Berk Geveci]

> Thanks, Berk. I'm glad to hear support for time series animation will be
> back soon. By the way, will the legacy VTK format continue to be
> supported in the future? Are there any plans for phasing it out?

We have no plans to phase out legacy VTK format. Despite the fact that
we call it legacy :-) We should call it 'VTK format that is so 1984".

-berk