RFR: 8351152: x86: Remove code blocks that handle UseSSE < 2 [v2]

[Aleksey Shipilev]

> 32-bit x86 was the platform that supported `UseSSE < 2`. 64-bit x86 baselines on `UseSSE >= 2`: https://github.com/openjdk/jdk/blob/567c6885a377e5641deef9cd3498f79c5346cd6a/src/hotspot/cpu/x86/vm_version_x86.cpp#L895-L902
> 
> After 32-bit x86 code is gone, we can remove all code blocks that are there to support `UseSSE < 2`.
> 
> Additional testing:
>  - [x] Linux x86_64 server fastdebug, `all`

Aleksey Shipilev has updated the pull request incrementally with one additional commit since the last revision:

  Also purge vestigial calls to VMVersion::supports_sse{2}

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/24484/files
  - new: https://git.openjdk.org/jdk/pull/24484/files/04f50944..7f505137

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24484&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24484&range=00-01

  Stats: 179 lines in 1 file changed: 0 ins; 179 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24484.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24484/head:pull/24484

PR: https://git.openjdk.org/jdk/pull/24484