RFR: 8325941: Remove unused Space::block_size

[Albert Mingkun Yang]

On Thu, 15 Feb 2024 10:43:00 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Trivial removing dead code.

Thanks for review.

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PR Comment: https://git.openjdk.org/jdk/pull/17869#issuecomment-1948842939