Removed the VTK version from the about dialog
Removed the VTK version from the about dialog

It was not showing the correct version, seemed to be consistently
missing the expected output from git describe. The VTK version can
be obtained by inspecting ParaView and looking at the VTK submodule.

mathturtle/tomviz,OpenChemistry/tomviz,thewtex/tomviz,cjh1/tomviz,thewtex/tomviz,cjh1/tomviz,OpenChemistry/tomviz,mathturtle/tomviz,mathturtle/tomviz,cjh1/tomviz,OpenChemistry/tomviz,cryos/tomviz,cryos/tomviz,thewtex/tomviz,OpenChemistry/tomviz,cryos/tomviz