RFR: 8339783: Implementation of JEP 479: Remove the Windows 32-bit x86 Port [v2]

[Magnus Ihse Bursie]

> This is the implementation of [JEP 479: _Remove the Windows 32-bit x86 Port_](https://openjdk.org/jeps/479).
> 
> This is the summary of JEP 479:
>> Remove the source code and build support for the Windows 32-bit x86 port. This port was [deprecated for removal in JDK 21](https://openjdk.org/jeps/449) with the express intent to remove it in a future release.

Magnus Ihse Bursie has updated the pull request incrementally with two additional commits since the last revision:

 - Remove FIXMEs on x86 code that will soon go away anyway
 - Remove FIXME for issue resolved in JDK-8343167

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/21744/files
  - new: https://git.openjdk.org/jdk/pull/21744/files/a18d19c7..d5280f6d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21744&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21744&range=00-01

  Stats: 4 lines in 3 files changed: 0 ins; 4 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21744.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21744/head:pull/21744

PR: https://git.openjdk.org/jdk/pull/21744