RFR: 8314113: G1: Remove unused G1CardSetInlinePtr::card_at

[Albert Mingkun Yang]

On Thu, 10 Aug 2023 12:26:51 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/15223#issuecomment-1674667500