Remove IXFA_Parser, cleanup XFA parser code.

xfa/fxfa/parser/xfa_basic_imp.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 "xfa/fxfa/parser/xfa_basic_imp.h"
 
 #include "core/fxcrt/include/fx_ext.h"
 #include "xfa/fgas/crt/fgas_codepage.h"
 #include "xfa/fgas/crt/fgas_system.h"
 #include "xfa/fxfa/parser/xfa_basic_data.h"
 #include "xfa/fxfa/parser/xfa_doclayout.h"
 #include "xfa/fxfa/parser/xfa_document.h"
 #include "xfa/fxfa/parser/xfa_localemgr.h"
 #include "xfa/fxfa/parser/xfa_object.h"
-#include "xfa/fxfa/parser/xfa_parser.h"
 #include "xfa/fxfa/parser/xfa_script.h"
 #include "xfa/fxfa/parser/xfa_utils.h"
 
 const XFA_PACKETINFO* XFA_GetPacketByName(const CFX_WideStringC& wsName) {
   if (wsName.IsEmpty())
     return nullptr;
 
   uint32_t uHash = FX_HashCode_GetW(wsName, false);
   int32_t iStart = 0;
   int32_t iEnd = g_iXFAPacketCount - 1;
@@ skipping 564 matching lines @@
   return nullptr;
 }
 
 void CXFA_WideTextRead::Lock() {}
 
 void CXFA_WideTextRead::Unlock() {}
 
 CFX_WideString CXFA_WideTextRead::GetSrcText() const {
   return m_wsBuffer;
 }