Remove more unused widget styles

xfa/fwl/cfwl_checkbox.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/fwl/cfwl_checkbox.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 161 matching lines @@
   else
     dwStates |= CFWL_PartState_Normal;
   if (m_pProperties->m_dwStates & FWL_WGTSTATE_Focused)
     dwStates |= CFWL_PartState_Focused;
   return dwStates;
 }
 
 void CFWL_CheckBox::UpdateTextOutStyles() {
   m_iTTOAlign = FDE_TTOALIGNMENT_TopLeft;
   m_dwTTOStyles = 0;
-  if (m_pProperties->m_dwStyleExes & FWL_WGTSTYLE_RTLReading)
-    m_dwTTOStyles |= FDE_TTOSTYLE_RTL;
   m_dwTTOStyles |= FDE_TTOSTYLE_SingleLine;
 }
 
 void CFWL_CheckBox::NextStates() {
   uint32_t dwFirststate = m_pProperties->m_dwStates;
   if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CKB_RadioButton) {
     if ((m_pProperties->m_dwStates & FWL_STATE_CKB_CheckMask) ==
         FWL_STATE_CKB_Unchecked) {
       CFWL_WidgetMgr* pWidgetMgr = GetOwnerApp()->GetWidgetMgr();
       if (!pWidgetMgr->IsFormDisabled()) {
@@ skipping 170 matching lines @@
 }
 
 void CFWL_CheckBox::OnKeyDown(CFWL_MessageKey* pMsg) {
   if (pMsg->m_dwKeyCode == FWL_VKEY_Tab)
     return;
   if (pMsg->m_dwKeyCode == FWL_VKEY_Return ||
       pMsg->m_dwKeyCode == FWL_VKEY_Space) {
     NextStates();
   }
 }