fix(CubeSource): Do not translate twice
fix(CubeSource): Do not translate twice

This is follow-up to Kitware/vtk-js@12681ad21d4893d454eff87165aeb1d421120008. A translation was
added there even though the center translation already occurs in the preceeding code.

Kitware/vtk-js,Kitware/vtk-js,Kitware/vtk-js,Kitware/vtk-js