Remove references to selection frustum visibility
The frustum is no longer viewable for Select Cells/Points Through. Remove it.
Also need to remove it from Ex 2.28 in the tutorial guide 5.11.0.
Originally reported here: https://discourse.paraview.org/t/does-anyone-look-at-the-frustum-resulting-from-select-cells-through-select-points-through/9004/6