RFR: 8293213: G1: Remove redundant assertion in G1RemSet::clean_card_before_refine

[Albert Mingkun Yang]

On Thu, 1 Sep 2022 13:19:09 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simple change of removing redundant assertion.
> 
> Test: hotspot_gc

Thanks for the review.

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PR: https://git.openjdk.org/jdk/pull/10120