Remove unused widget handler overrides

fpdfsdk/formfiller/cffl_formfiller.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/formfiller/cffl_formfiller.h"
 
 #include "core/fpdfapi/page/cpdf_page.h"
 #include "core/fxge/cfx_renderdevice.h"
@@ skipping 90 matching lines @@
 }
 
 void CFFL_FormFiller::OnDrawDeactive(CPDFSDK_PageView* pPageView,
                                      CPDFSDK_Annot* pAnnot,
                                      CFX_RenderDevice* pDevice,
                                      CFX_Matrix* pUser2Device) {
   CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;
   pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Normal, nullptr);
 }
 
-void CFFL_FormFiller::OnCreate(CPDFSDK_Annot* pAnnot) {}
-
-void CFFL_FormFiller::OnLoad(CPDFSDK_Annot* pAnnot) {}
-
-void CFFL_FormFiller::OnDelete(CPDFSDK_Annot* pAnnot) {}
-
 void CFFL_FormFiller::OnMouseEnter(CPDFSDK_PageView* pPageView,
                                    CPDFSDK_Annot* pAnnot) {}
 
 void CFFL_FormFiller::OnMouseExit(CPDFSDK_PageView* pPageView,
                                   CPDFSDK_Annot* pAnnot) {
   EndTimer();
   ASSERT(m_pWidget);
 }
 
 FX_BOOL CFFL_FormFiller::OnLButtonDown(CPDFSDK_PageView* pPageView,
@@ skipping 584 matching lines @@
     pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Normal, nullptr);
   }
 }
 
 void CFFL_Button::OnDrawDeactive(CPDFSDK_PageView* pPageView,
                                  CPDFSDK_Annot* pAnnot,
                                  CFX_RenderDevice* pDevice,
                                  CFX_Matrix* pUser2Device) {
   OnDraw(pPageView, pAnnot, pDevice, pUser2Device);
 }