Cleanup cfwl_* files.

xfa/fwl/core/cfwl_pushbutton.cpp

Index: xfa/fwl/core/cfwl_pushbutton.cpp
diff --git a/xfa/fwl/core/cfwl_pushbutton.cpp b/xfa/fwl/core/cfwl_pushbutton.cpp
index 1fc6191d3d8fdbad4eb1d2fdcd5255ab6e923842..90c8ab4941d82b98ee87a3ba087fb0e0d39c6004 100644
--- a/xfa/fwl/core/cfwl_pushbutton.cpp
+++ b/xfa/fwl/core/cfwl_pushbutton.cpp
@@ -10,8 +10,7 @@
 
 #include "third_party/base/ptr_util.h"
 
-CFWL_PushButton::CFWL_PushButton(const IFWL_App* app)
-    : CFWL_Widget(app), m_pBitmap(nullptr) {}
+CFWL_PushButton::CFWL_PushButton(const IFWL_App* app) : CFWL_Widget(app) {}
 
 CFWL_PushButton::~CFWL_PushButton() {}
 
@@ -24,25 +23,7 @@ void CFWL_PushButton::Initialize() {
   CFWL_Widget::Initialize();
 }
 
-FWL_Error CFWL_PushButton::SetCaption(const CFX_WideStringC& wsCaption) {
-  m_wsCaption = wsCaption;
-  return FWL_Error::Succeeded;
-}
-
-CFX_DIBitmap* CFWL_PushButton::GetPicture() {
-  return m_pBitmap;
-}
-
-FWL_Error CFWL_PushButton::SetPicture(CFX_DIBitmap* pBitmap) {
-  m_pBitmap = pBitmap;
-  return FWL_Error::Succeeded;
-}
-
 void CFWL_PushButton::GetCaption(IFWL_Widget* pWidget,
                                  CFX_WideString& wsCaption) {
-  wsCaption = m_wsCaption;
-}
-
-CFX_DIBitmap* CFWL_PushButton::GetPicture(IFWL_Widget* pWidget) {
-  return m_pBitmap;
+  wsCaption = L"";
 }