Removed some shaders in cgogn.

git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@10278 b7f1a160-662a-0410-a6d8-bea165342f16
Removed useless openNL examples

git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@10279 b7f1a160-662a-0410-a6d8-bea165342f16