RFR: 8326941: Remove StringUTF16::isBigEndian

[Claes Redestad]

On Mon, 18 Mar 2024 14:09:09 GMT, Per Minborg <pminborg at openjdk.org> wrote:

> This PR proposes to remove the native method `StringUTF16::isBigEndian` and its corresponding C implementation and instead rely on the `jdk.internal.misc.Unsafe::isBigEndian` method.

Does this change how early `Unsafe` is initialized, and does it in turn have dependencies on `StringUTF16`? `StringUTF16` is loaded very early, especially if `-XX:-CompactStrings` is supplied and I would assume the only reason this was added in the first place was to avoid some bootstrapping issue.

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PR Comment: https://git.openjdk.org/jdk/pull/18348#issuecomment-2004086796