Cleanup unused fgas/ code.

xfa/fgas/layout/fgas_unicode.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_LAYOUT_FGAS_UNICODE_H_
 #define XFA_FGAS_LAYOUT_FGAS_UNICODE_H_
 
 #include "xfa/fgas/crt/fgas_utils.h"
 #include "xfa/fgas/font/fgas_font.h"
 
-#define FX_JAPCHARPROPERTYEX_Left 0x01
-#define FX_JAPCHARPROPERTYEX_Center 0x02
-#define FX_JAPCHARPROPERTYEX_Right 0x03
-#define FX_JAPCHARPROPERTYEX_Top 0x10
-#define FX_JAPCHARPROPERTYEX_Middle 0x20
-#define FX_JAPCHARPROPERTYEX_Bottom 0x30
-
 struct FX_TPO {
   int32_t index;
   int32_t pos;
 };
 typedef CFX_MassArrayTemplate<FX_TPO> CFX_TPOArray;
 
 void FX_TEXTLAYOUT_PieceSort(CFX_TPOArray& tpos, int32_t iStart, int32_t iEnd);
 
-struct FX_JAPCHARPROPERTYEX {
-  uint16_t wChar;
-  uint8_t uAlign;
-};
-
-const FX_JAPCHARPROPERTYEX* FX_GetJapCharPropertyEx(FX_WCHAR wch);
 typedef FX_BOOL (*FX_AdjustCharDisplayPos)(FX_WCHAR wch,
                                            FX_BOOL bMBCSCode,
                                            IFX_Font* pFont,
                                            FX_FLOAT fFontSize,
                                            FX_BOOL bVertical,
                                            CFX_PointF& ptOffset);
-FX_BOOL FX_AdjustJapCharDisplayPos(FX_WCHAR wch,
-                                   FX_BOOL bMBCSCode,
-                                   IFX_Font* pFont,
-                                   FX_FLOAT fFontSize,
-                                   FX_BOOL bVertical,
-                                   CFX_PointF& ptOffset);
 
 #endif  // XFA_FGAS_LAYOUT_FGAS_UNICODE_H_