RFR: 8355577: Remove old sparc remnants in the hotspot linux code

Fri Apr 25 12:50:24 UTC 2025

Linux SPARC support is long gone, but there are a few remnants of SPARC support in hotspot Linux coding. Remove them where it is beneficial to clean up.

I kept sparc in the shared lib handling code because this runs on other platforms too.

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

Commit messages:
 - JDK-8355577

Changes: https://git.openjdk.org/jdk/pull/24873/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24873&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8355577
  Stats: 7 lines in 1 file changed: 0 ins; 6 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/24873.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24873/head:pull/24873

PR: https://git.openjdk.org/jdk/pull/24873