Remove some IFX_* wrappers.

fpdfsdk/fxedit/fxet_module.cpp

-// 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
-
-#include "core/fpdfdoc/include/cpdf_variabletext.h"
-#include "fpdfsdk/fxedit/include/fxet_edit.h"
-#include "fpdfsdk/fxedit/include/fxet_list.h"
-
-IFX_Edit* IFX_Edit::NewEdit() {
-  return new CFX_Edit(new CPDF_VariableText());
-}
-
-void IFX_Edit::DelEdit(IFX_Edit* pEdit) {
-  delete pEdit->GetVariableText();
-  delete static_cast<CFX_Edit*>(pEdit);
-}
-
-IFX_List* IFX_List::NewList() {
-  return new CFX_ListCtrl();
-}
-
-void IFX_List::DelList(IFX_List* pList) {
-  ASSERT(pList);
-  delete (CFX_ListCtrl*)pList;
-}