git: openjdk/jdk: 8323780: Serial: Remove unused _full_collections_completed

[Albert Mingkun Yang]

Changeset: 44a9392e
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2024-01-16 11:56:10 +0000
URL:       https://git.openjdk.org/jdk/commit/44a9392ecade2bc1ba78ce695a98ccfddc65c516

8323780: Serial: Remove unused _full_collections_completed

Reviewed-by: ehelin, stefank

! src/hotspot/share/gc/serial/serialHeap.cpp
! src/hotspot/share/gc/serial/serialHeap.hpp