Bug#810254: vtk7: switched from ITP to RFP

[Ghislain Vaillant <ghisvail@gmail.com>]

control: noowner -1
control: retitle -1 RFP: vtk7 -- Visualization Toolkit (VTK) version 7

I am hereby withdrawing my intent to package VTK 7.

Anyone interested to work on VTK 7 for Stretch, feel free to step up
and assign yourself to this bug.

Cheers,
Ghis