RFR: 8356394: Remove USE_LIBRARY_BASED_TLS_ONLY macro

[Kim Barrett]

On Wed, 7 May 2025 14:48:50 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> The macro USE_LIBRARY_BASED_TLS_ONLY played a role on AIX and some mobile platforms a while ago but currently it seems to be not needed any more, so it can be removed.
> See the discussion here
> https://mail.openjdk.org/pipermail/mobile-dev/2025-May/000946.html

Looks good.

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Marked as reviewed by kbarrett (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/25099#pullrequestreview-2824927963