RFR: 8296670: G1: Remove unused G1GCPhaseTimes::record_preserve_cm_referents_time_ms

[Albert Mingkun Yang]

On Wed, 9 Nov 2022 13:39:17 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Trivial change of removing effectively dead code.

Thanks for the review.

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PR: https://git.openjdk.org/jdk/pull/11061