COMP: Fix duplicate inherited member issues.
Fix duplicate inherited member warnings in vtkBiDimensionalRepresentation2D reported at: https://open.cdash.org/viewBuildError.php?type=1&buildid=4730716
Fix duplicate inherited member warnings in vtkBiDimensionalRepresentation2D reported at: https://open.cdash.org/viewBuildError.php?type=1&buildid=4730716