[`backports-release-1.11`]: Revert "fix null comparisons for non-standard address spaces (#58837)" (#59445)
This reverts commit 3b04664577713059bee663fb3d1cd37080a7ff8e (which
backports #58837 to 1.11.x).
For more details, see
https://github.com/JuliaLang/julia/pull/59336#issuecomment-3239568360
and
https://github.com/JuliaLang/julia/pull/59336#issuecomment-3239575723.
Targets `backports-release-1.11` (#59336).