Merge topic 'smaller_opengl'

9b797128 reduce OpenGL dependencies removing unused libs

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2801

Rendering/OpenGL2/module.cmake

@@ -29,8 +29,6 @@ vtk_module(vtkRenderingOpenGL2
     vtkCommonMath
     vtkCommonSystem
     vtkCommonTransforms
-    vtkIOImage
-    vtkImagingCore
     vtkglew
     vtksys
-  )
\ No newline at end of file
+  )