Integrated: 8325134: Serial: Remove Generation::used_region

[Albert Mingkun Yang]

On Thu, 1 Feb 2024 15:44:40 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Trivial removing dead code. The change of moving the definition to `tenuredGeneration.hpp` is needed to work around linking failure.

This pull request has now been integrated.

Changeset: cdf918b1
Author:    Albert Mingkun Yang <ayang at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/cdf918b1d0838839254f058b69ef5bf363bdc196
Stats:     11 lines in 3 files changed: 2 ins; 9 del; 0 mod

8325134: Serial: Remove Generation::used_region

Reviewed-by: tschatzl, iwalulya

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PR: https://git.openjdk.org/jdk/pull/17673