message: memory: remove constraint on globals size ensuring there's no OOM
  this condition is implied by the addresses disjointness constraint
diff: @@ -948,20 +948,6 @@ void Memory::mkAxioms(const Memory &other) const {
  state->addAxiom(p1.is_block_alive().implies(disj));
  }
  - // ensure globals fit in their reserved space
  - {
  - auto sum_globals = expr::mkUInt(0, bits_size_t - 1);
  -
  - for (unsigned bid = 1; bid < num_nonlocals; ++bid) {
  - Pointer p(*this, bid, false);
  - auto sz = p.block_size().extract(bits_size_t - 2, 0);
  - state->addAxiom(p.is_block_alive()
  - .implies(sum_globals.add_no_uoverflow(sz)));
  - sum_globals = expr::mkIf(p.is_block_alive(), sum_globals + sz,
  - sum_globals);
  - }
  - }
  -
  // ensure locals fit in their reserved space
  auto locals_fit = [](const Memory &m) {
  auto sum = expr::mkUInt(0, bits_size_t - 1);
  