Remove RichText support from fpdfsdk/fxedit.

fpdfsdk/pdfwindow/PWL_EditCtrl.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 FPDFSDK_PDFWINDOW_PWL_EDITCTRL_H_
 #define FPDFSDK_PDFWINDOW_PWL_EDITCTRL_H_
 
 #include "core/fxcrt/include/fx_string.h"
@@ skipping 120 matching lines @@
                          FX_FLOAT fContentMin,
                          FX_FLOAT fContentMax,
                          FX_FLOAT fSmallStep,
                          FX_FLOAT fBigStep) override;
   void IOnSetScrollPosX(FX_FLOAT fx) override {}
   void IOnSetScrollPosY(FX_FLOAT fy) override;
   void IOnSetCaret(FX_BOOL bVisible,
                    const CFX_FloatPoint& ptHead,
                    const CFX_FloatPoint& ptFoot,
                    const CPVT_WordPlace& place) override;
-  void IOnCaretChange(const CPVT_SecProps& secProps,
-                      const CPVT_WordProps& wordProps) override;
   void IOnContentChange(const CFX_FloatRect& rcContent) override;
   void IOnInvalidateRect(CFX_FloatRect* pRect) override;
 
   void InsertText(const FX_WCHAR* csText);
   void SetText(const FX_WCHAR* csText);
   void CopyText();
   void PasteText();
   void CutText();
   void ShowVScrollBar(FX_BOOL bShow);
   void InsertWord(uint16_t word, int32_t nCharset);
@@ skipping 19 matching lines @@
   CPWL_Caret* m_pEditCaret;
   FX_BOOL m_bMouseDown;
   IPWL_Edit_Notify* m_pEditNotify;
 
  private:
   int32_t m_nCharSet;
   int32_t m_nCodePage;
 };
 
 #endif  // FPDFSDK_PDFWINDOW_PWL_EDITCTRL_H_