Remove more unused widget styles

xfa/fwl/cfwl_pushbutton.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_pushbutton.h"
 
 #include <memory>
 #include <utility>
@@ skipping 89 matching lines @@
   else if (m_pProperties->m_dwStates & FWL_STATE_PSB_Pressed)
     dwStates |= CFWL_PartState_Pressed;
   else if (m_pProperties->m_dwStates & FWL_STATE_PSB_Hovered)
     dwStates |= CFWL_PartState_Hovered;
   return dwStates;
 }
 
 void CFWL_PushButton::UpdateTextOutStyles() {
   m_iTTOAlign = FDE_TTOALIGNMENT_TopLeft;
   m_dwTTOStyles = FDE_TTOSTYLE_SingleLine;
-  if (m_pProperties->m_dwStyleExes & FWL_WGTSTYLE_RTLReading)
-    m_dwTTOStyles |= FDE_TTOSTYLE_RTL;
 }
 
 void CFWL_PushButton::OnProcessMessage(CFWL_Message* pMessage) {
   if (!pMessage)
     return;
   if (!IsEnabled())
     return;
 
   switch (pMessage->GetType()) {
     case CFWL_Message::Type::SetFocus:
@@ skipping 119 matching lines @@
   if (pMsg->m_dwKeyCode != FWL_VKEY_Return)
     return;
 
   CFWL_EventMouse wmMouse(this);
   wmMouse.m_dwCmd = FWL_MouseCommand::LeftButtonUp;
   DispatchEvent(&wmMouse);
 
   CFWL_Event wmClick(CFWL_Event::Type::Click, this);
   DispatchEvent(&wmClick);
 }