Remove unused widget handler overrides

fpdfsdk/ipdfsdk_annothandler.h

Index: fpdfsdk/ipdfsdk_annothandler.h
diff --git a/fpdfsdk/ipdfsdk_annothandler.h b/fpdfsdk/ipdfsdk_annothandler.h
index 84da0c4054244ed478a2540a5bffebe31a1e4a39..e91b329eb7387c3c238616e5c35aa1d93eadf57b 100644
--- a/fpdfsdk/ipdfsdk_annothandler.h
+++ b/fpdfsdk/ipdfsdk_annothandler.h
@@ -34,7 +34,6 @@ class IPDFSDK_AnnotHandler {
 #endif  // PDF_ENABLE_XFA
 
   virtual void ReleaseAnnot(CPDFSDK_Annot* pAnnot) = 0;
-  virtual void DeleteAnnot(CPDFSDK_Annot* pAnnot) = 0;
   virtual CFX_FloatRect GetViewBBox(CPDFSDK_PageView* pPageView,
                                     CPDFSDK_Annot* pAnnot) = 0;
   virtual FX_BOOL HitTest(CPDFSDK_PageView* pPageView,
@@ -45,10 +44,7 @@ class IPDFSDK_AnnotHandler {
                       CFX_RenderDevice* pDevice,
                       CFX_Matrix* pUser2Device,
                       bool bDrawAnnots) = 0;
-  virtual void OnCreate(CPDFSDK_Annot* pAnnot) = 0;
   virtual void OnLoad(CPDFSDK_Annot* pAnnot) = 0;
-  virtual void OnDelete(CPDFSDK_Annot* pAnnot) = 0;
-  virtual void OnRelease(CPDFSDK_Annot* pAnnot) = 0;
 
   virtual void OnMouseEnter(CPDFSDK_PageView* pPageView,
                             CPDFSDK_Annot::ObservedPtr* pAnnot,
@@ -94,8 +90,6 @@ class IPDFSDK_AnnotHandler {
                          uint32_t nFlags) = 0;
   virtual FX_BOOL OnKeyDown(CPDFSDK_Annot* pAnnot, int nKeyCode, int nFlag) = 0;
   virtual FX_BOOL OnKeyUp(CPDFSDK_Annot* pAnnot, int nKeyCode, int nFlag) = 0;
-  virtual void OnDeSelected(CPDFSDK_Annot* pAnnot) = 0;
-  virtual void OnSelected(CPDFSDK_Annot* pAnnot) = 0;
   virtual FX_BOOL OnSetFocus(CPDFSDK_Annot::ObservedPtr* pAnnot,
                              uint32_t nFlag) = 0;
   virtual FX_BOOL OnKillFocus(CPDFSDK_Annot::ObservedPtr* pAnnot,