RFR: 8297572: Remove unused PrecisionStyle::Precise

[Kim Barrett]

On Mon, 19 Dec 2022 20:37:32 GMT, Y. Srinivas Ramakrishna <ysr at openjdk.org> wrote:

>> The code uses `size()` rather than `block_size()`. So my guess is this comment is somewhat obsolete and the comment verbage would need minor updates.
>
> Indeed, I'd delete lines 61-64 and be done.

I think @ysramakrishna is right, and agree with his suggestion to delete stale comment lines.

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PR: https://git.openjdk.org/jdk/pull/11676