RFR: 8331723: Serial: Remove the unused parameter of the method SerialHeap::gc_prologue

[xiaotaonan]

Serial: Remove the unused parameter of the method SerialHeap::gc_prologue

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Commit messages:
 - Serial: Remove the unused parameter of the method SerialHeap::gc_prologue

Changes: https://git.openjdk.org/jdk/pull/19165/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19165&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8331723
  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/19165.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19165/head:pull/19165

PR: https://git.openjdk.org/jdk/pull/19165