message: [libomptarget] Remove stale omp handle
  This was never used in the upstream compiler and was responsible
  for some problems with reductions in the clang-ykt fork.
diff: @@ -2200,9 +2200,6 @@ static int target(int32_t device_id, void *host_ptr, int32_t arg_num,
  tgt_args.push_back(TgtPtrBegin);
  tgt_offsets.push_back(TgtBaseOffset);
  }
  - // Push omp handle.
  - tgt_args.push_back((void *)0);
  - tgt_offsets.push_back(0);
  assert(tgt_args.size() == tgt_offsets.size() &&
  "Size mismatch in arguments and offsets");
  