RFR: 8372163: G1: Remove unused G1HeapRegion::remove_code_root

[Albert Mingkun Yang]

On Wed, 19 Nov 2025 15:16:16 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Trivial removing dead code.
> 
> Test: build

Thanks for review.

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PR Comment: https://git.openjdk.org/jdk/pull/28392#issuecomment-3557518118