message: Remove openmp support
diff: @@ -171,10 +171,6 @@ if(UNIX)
  if(COMPILER_VERSION VERSION_LESS 3.3 )
  message(FATAL_ERROR "RINGMesh require Clang version >= 3.3")
  endif()
  - if(USE_OPENMP)
  - message(WARNING "Clang does not support OpenMP. Option is set to off")
  - set(USE_OPENMP FALSE)
  - endif()
  elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
  if(COMPILER_VERSION VERSION_LESS 4.8 )
  message(FATAL_ERROR "RINGMesh require G++ version >= 4.8")
  