RFR: 8297572: Remove unused PrecisionStyle::Precise

[Albert Mingkun Yang]

On Wed, 14 Dec 2022 14:50:10 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simple change of removing some effectively dead code.
> 
> Test: hotspot_gc

I will remove those stale comments in another PR, as they are not directly tied to this ticket.

Thanks for the review.

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