RFR: 8355472: Clean up x86 nativeInst after 32-bit x86 removal

Mon Apr 28 08:41:47 UTC 2025

On Mon, 28 Apr 2025 08:23:25 GMT, Manuel Hässig <duke at openjdk.org> wrote:

> This PR cleans up code 32-bit x86 code in `nativeInst_x86.*` files.
> 
> Testing:
>  - [x] tier1 through tier4 on x86 plus Oracle internal testing

Looks good, thanks!

-------------

Marked as reviewed by rcastanedalo (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/24911#pullrequestreview-2798499048