8281450: Remove unnecessary operator new and delete from ObjectMonitor

Backport-of: 83d67452da248db17bc72de80247a670d6813cf5

src/hotspot/share/runtime/objectMonitor.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2022, Oracle and/or its affiliates. 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
@@ -233,19 +233,6 @@ OopStorage* ObjectMonitor::_oop_storage = NULL;
 // * See also http://blogs.sun.com/dave
 
 
-void* ObjectMonitor::operator new (size_t size) throw() {
-  return AllocateHeap(size, mtInternal);
-}
-void* ObjectMonitor::operator new[] (size_t size) throw() {
-  return operator new (size);
-}
-void ObjectMonitor::operator delete(void* p) {
-  FreeHeap(p);
-}
-void ObjectMonitor::operator delete[] (void *p) {
-  operator delete(p);
-}
-
 // Check that object() and set_object() are called from the right context:
 static void check_object_context() {
 #ifdef ASSERT

src/hotspot/share/runtime/objectMonitor.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2022, Oracle and/or its affiliates. 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
@@ -203,11 +203,6 @@ class ObjectMonitor : public CHeapObj<mtObjectMonitor> {
 
   static int Knob_SpinLimit;
 
-  void* operator new (size_t size) throw();
-  void* operator new[] (size_t size) throw();
-  void operator delete(void* p);
-  void operator delete[] (void* p);
-
   // TODO-FIXME: the "offset" routines should return a type of off_t instead of int ...
   // ByteSize would also be an appropriate type.
   static int header_offset_in_bytes()      { return offset_of(ObjectMonitor, _header); }