mun being the buildbot that is used to test the WikiExamples, I think we should set VTK_LEGACY_REMOVE to off.
It is needed because :
- WikiExample is a remote module on github, which prevents it to be tested with fork branch like a submodule can be in VTK.
- Any API change will break the build of WikiExamples on mun, even when using VTK_LEGACY macro
- If mun can’t build, then mun can’t test standard VTK tests