RFR: 8372337: clang compilation error on hardware_constructive_interference_size

[Kim Barrett]

Please review this trivial fix for a compiler error when building with clang
on Linux (and possibly in other configurations with clang). Rathern than
attempt to version-conditionalize the deprecating declaration of the hardware
interference variables, just never make the attempt at all, since we don't
know of a version of clang that will handle the declaration as expected.

Testing: Locally (linux-aarch64) built JDK with clang19.1 as the compiler.

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Commit messages:
 - don't try to deprecate hardare interference vars with any version of clang

Changes: https://git.openjdk.org/jdk/pull/28484/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28484&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8372337
  Stats: 5 lines in 1 file changed: 0 ins; 1 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/28484.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28484/head:pull/28484

PR: https://git.openjdk.org/jdk/pull/28484