Kitware Robot authored Jun 01, 2016 and Ben Boeckel committed Jun 01, 2016

Removed using the following command:

    perl -0777 -i -pe 's/(\n* *\/\/ *[BE]TX *\n+)+/\n\n/g'

on all vtk*.h, pq*.h and finished off by a few manual removals left over
from that.