Remove reference to Openmpi C++ binding
This binding was removed here so no need to keep it in CMakeLists in MoReFEM (moreover it was not used at all...)
La mise à jour de gitlab est terminée. Nous sommes désormais en version 16.11.1
Merci de consulter la release note:
https://about.gitlab.com/releases/2024/04/18/gitlab-16-11-released/
This binding was removed here so no need to keep it in CMakeLists in MoReFEM (moreover it was not used at all...)