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

-------------

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

Changes: https://git.openjdk.org/jdk/pull/19207/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19207&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8331723
  Stats: 4 lines in 2 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/19207.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19207/head:pull/19207

PR: https://git.openjdk.org/jdk/pull/19207