vtkOpenGLProperty: remove unused function
vtkOpenGLProperty: remove unused function

Seems to have been copy/paste from the old OpenGL module.

Change-Id: If0475c3507da715db9e9fb5425ce839916f9649e

hendradarwin/VTK,SimVascular/VTK,sumedhasingla/VTK,demarle/VTK,msmolens/VTK,SimVascular/VTK,sumedhasingla/VTK,candy7393/VTK,gram526/VTK,jmerkow/VTK,SimVascular/VTK,msmolens/VTK,jmerkow/VTK,keithroe/vtkoptix,demarle/VTK,msmolens/VTK,ashray/VTK-EVM,SimVascular/VTK,candy7393/VTK,jmerkow/VTK,johnkit/vtk-dev,SimVascular/VTK,keithroe/vtkoptix,keithroe/vtkoptix,ashray/VTK-EVM,keithroe/vtkoptix,berendkleinhaneveld/VTK,mspark93/VTK,ashray/VTK-EVM,sumedhasingla/VTK,candy7393/VTK,mspark93/VTK,gram526/VTK,mspark93/VTK,gram526/VTK,sumedhasingla/VTK,hendradarwin/VTK,demarle/VTK,johnkit/vtk-dev,demarle/VTK,keithroe/vtkoptix,mspark93/VTK,keithroe/vtkoptix,johnkit/vtk-dev,sankhesh/VTK,gram526/VTK,SimVascular/VTK,candy7393/VTK,sumedhasingla/VTK,ashray/VTK-EVM,demarle/VTK,msmolens/VTK,msmolens/VTK,gram526/VTK,jmerkow/VTK,ashray/VTK-EVM,hendradarwin/VTK,candy7393/VTK,demarle/VTK,mspark93/VTK,sumedhasingla/VTK,mspark93/VTK,msmolens/VTK,ashray/VTK-EVM,gram526/VTK,msmolens/VTK,keithroe/vtkoptix,sankhesh/VTK,hendradarwin/VTK,candy7393/VTK,sankhesh/VTK,johnkit/vtk-dev,sankhesh/VTK,johnkit/vtk-dev,candy7393/VTK,berendkleinhaneveld/VTK,sankhesh/VTK,sumedhasingla/VTK,jmerkow/VTK,demarle/VTK,gram526/VTK,berendkleinhaneveld/VTK,hendradarwin/VTK,msmolens/VTK,SimVascular/VTK,demarle/VTK,sankhesh/VTK,jmerkow/VTK,ashray/VTK-EVM,mspark93/VTK,sankhesh/VTK,berendkleinhaneveld/VTK,johnkit/vtk-dev,keithroe/vtkoptix,berendkleinhaneveld/VTK,hendradarwin/VTK,mspark93/VTK,johnkit/vtk-dev,berendkleinhaneveld/VTK,sankhesh/VTK,candy7393/VTK,berendkleinhaneveld/VTK,jmerkow/VTK,gram526/VTK,sumedhasingla/VTK,hendradarwin/VTK,jmerkow/VTK,SimVascular/VTK,ashray/VTK-EVM