RFR: 8357401: BigDecimal: Constants ONE_TENTH and ONE_HALF are unused after JDK-8341402

[Joe Darcy]

On Wed, 21 May 2025 00:59:34 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

> Both fields were added by the [JDK-4851777](https://bugs.openjdk.org/browse/JDK-4851777):
> see https://github.com/openjdk/jdk/commit/4045a8be07195acac7fb2faef0e6bf90edcaf9f8
> And the usage were deleted by the [JDK-8341402](https://bugs.openjdk.org/browse/JDK-8341402):
> see https://github.com/openjdk/jdk/commit/c4c3edfa964ef504f12971c5deef7c7355bdf325

Marked as reviewed by darcy (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/25339#pullrequestreview-2863134181