message: Refactor `ceed.hpp`.
diff: #if !CEED_VERSION_GE(0,10,0)
  #error MFEM requires a libCEED version >= 0.10.0
  #endif
  -#endif
  namespace mfem
  {
  @@ -25,17 +24,12 @@ namespace mfem
  namespace internal
  {
  -#ifdef MFEM_USE_CEED
  extern Ceed ceed;
  -#endif
  } // namespace internal
  -namespace ceed
  -{
  -
  -} // namespace ceed
  -
  } // namespace mfem
  +#endif // MFEM_USE_CEED
  +
  #endif // MFEM_LIBCEED_CEED
  