Remove RichText support from fpdfsdk/fxedit.

fpdfsdk/pdfwindow/PWL_EditCtrl.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 "fpdfsdk/pdfwindow/PWL_EditCtrl.h"
 
 #include "core/fpdfdoc/include/cpvt_section.h"
 #include "core/fpdfdoc/include/cpvt_word.h"
@@ skipping 548 matching lines @@
                                 const CFX_FloatPoint& ptFoot,
                                 const CPVT_WordPlace& place) {
   PWL_CARET_INFO cInfo;
   cInfo.bVisible = bVisible;
   cInfo.ptHead = ptHead;
   cInfo.ptFoot = ptFoot;
 
   OnNotify(this, PNM_SETCARETINFO, (intptr_t)&cInfo, (intptr_t) nullptr);
 }
 
-void CPWL_EditCtrl::IOnCaretChange(const CPVT_SecProps& secProps,
-                                   const CPVT_WordProps& wordProps) {}
-
 void CPWL_EditCtrl::IOnContentChange(const CFX_FloatRect& rcContent) {
   if (IsValid()) {
     if (m_pEditNotify) {
       m_pEditNotify->OnContentChange(rcContent);
     }
   }
 }
 
 void CPWL_EditCtrl::IOnInvalidateRect(CFX_FloatRect* pRect) {
   InvalidateRect(pRect);
@@ skipping 18 matching lines @@
   CPVT_WordPlace wpEnd = m_pEdit->WordIndexToWordPlace(nEndChar);
   return m_pEdit->GetRangeText(CPVT_WordRange(wpStart, wpEnd));
 }
 
 void CPWL_EditCtrl::SetReadyToInput() {
   if (m_bMouseDown) {
     ReleaseCapture();
     m_bMouseDown = FALSE;
   }
 }