Replace IFX_MemoryAllocator::Release() with delete.

xfa/fgas/crt/fgas_memory.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef XFA_FGAS_CRT_FGAS_MEMORY_H_
 #define XFA_FGAS_CRT_FGAS_MEMORY_H_
 
 #include "core/fxcrt/include/fx_memory.h"
 #include "core/fxcrt/include/fx_system.h"
 
 enum FX_ALLOCTYPE {
   FX_ALLOCTYPE_Static,
   FX_ALLOCTYPE_Fixed,
 };
 
 class IFX_MemoryAllocator {
  public:
   virtual ~IFX_MemoryAllocator() {}
-  virtual void Release() = 0;
-
   virtual void* Alloc(size_t size) = 0;
   virtual void Free(void* pBlock) = 0;
 
   static IFX_MemoryAllocator* Create(FX_ALLOCTYPE eType,
                                      size_t chunkSize,
                                      size_t blockSize);
 };
 
 class CFX_Target {
  public:
@@ skipping 11 matching lines @@
 };
 
 #define FXTARGET_NewWith(__allocator__) new (__allocator__)
 #define FXTARGET_DeleteWith(__class__, __allocator__, pointer) \
   {                                                            \
     (pointer)->~__class__();                                   \
     (pointer)->operator delete((pointer), (__allocator__));    \
   }
 
 #endif  // XFA_FGAS_CRT_FGAS_MEMORY_H_