RFR: 8316513: Serial: Remove unused invalidate_remembered_set

[Albert Mingkun Yang]

On Tue, 19 Sep 2023 08:52:18 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Trivial removing dead code.

Thanks for the review.

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PR Comment: https://git.openjdk.org/jdk/pull/15813#issuecomment-1725876410