message: STYLE: remove unneeded ifdef block
diff: // HELPER METHODS
  //------------------------------------------------------------------------------
  -#ifdef AXOM_USE_UMPIRE
  -#else
  -#endif
  -
  // This value is such that the 64Kb limit on device constant memory is not hit
  // in check_alloc_realloc_free when reallocating to 3 * SIZE.
  constexpr int SIZE = 5345;
  