8261984: Shenandoah: Remove unused ShenandoahPushWorkerQueuesScope class

Reviewed-by: shade

Author: zhengyu123

src/hotspot/share/gc/shenandoah/shenandoahWorkGroup.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.
+ * Copyright (c) 2017, 2021, Red Hat, Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -71,16 +71,6 @@ ShenandoahPushWorkerScope::~ShenandoahPushWorkerScope() {
   assert(nworkers == _old_workers, "Must be able to restore");
 }
 
-ShenandoahPushWorkerQueuesScope::ShenandoahPushWorkerQueuesScope(WorkGang* workers, ShenandoahObjToScanQueueSet* queues, uint nworkers, bool check) :
-  ShenandoahPushWorkerScope(workers, nworkers, check), _queues(queues) {
-  _queues->reserve(_n_workers);
-}
-
-ShenandoahPushWorkerQueuesScope::~ShenandoahPushWorkerQueuesScope() {
-  // Restore old worker value
-  _queues->reserve(_old_workers);
-}
-
 AbstractGangWorker* ShenandoahWorkGang::install_worker(uint which) {
   AbstractGangWorker* worker = WorkGang::install_worker(which);
   ShenandoahThreadLocalData::create(worker);

src/hotspot/share/gc/shenandoah/shenandoahWorkGroup.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2019, Red Hat, Inc. All rights reserved.
+ * Copyright (c) 2017, 2021, Red Hat, Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -51,15 +51,6 @@ class ShenandoahPushWorkerScope : StackObj {
   ~ShenandoahPushWorkerScope();
 };
 
-class ShenandoahPushWorkerQueuesScope : public ShenandoahPushWorkerScope {
-private:
-  ShenandoahObjToScanQueueSet* _queues;
-
-public:
-  ShenandoahPushWorkerQueuesScope(WorkGang* workers, ShenandoahObjToScanQueueSet* queues, uint nworkers, bool do_check = true);
-  ~ShenandoahPushWorkerQueuesScope();
-};
-
 class ShenandoahWorkGang : public WorkGang {
 private:
   bool     _initialize_gclab;