RFR: 8297572: Remove unused PrecisionStyle::Precise

[Kim Barrett]

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

Looks good, once the stale comment lines in space.cpp are removed as suggested in comments.

-------------

Marked as reviewed by kbarrett (Reviewer).

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