RFR: 8301446: Remove unused includes of gc/shared/genOopClosures

[Albert Mingkun Yang]

On Tue, 31 Jan 2023 07:25:05 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simple removing unused includes.

Thanks for the review.

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PR: https://git.openjdk.org/jdk/pull/12307