Remove unused IPDFSDK_AnnotHandler::OnDrawSleep.

fpdfsdk/cpdfsdk_widgethandler.cpp

Index: fpdfsdk/cpdfsdk_widgethandler.cpp
diff --git a/fpdfsdk/cpdfsdk_widgethandler.cpp b/fpdfsdk/cpdfsdk_widgethandler.cpp
index 5d459ee2d5fe4630ef0d3594d3fec560c3ebdf19..31f0cffcc8fdd72cc91c46d39d956f78b923020e 100644
--- a/fpdfsdk/cpdfsdk_widgethandler.cpp
+++ b/fpdfsdk/cpdfsdk_widgethandler.cpp
@@ -102,13 +102,6 @@ void CPDFSDK_WidgetHandler::OnDraw(CPDFSDK_PageView* pPageView,
   }
 }
 
-void CPDFSDK_WidgetHandler::OnDrawSleep(CPDFSDK_PageView* pPageView,
-                                        CPDFSDK_Annot* pAnnot,
-                                        CFX_RenderDevice* pDevice,
-                                        CFX_Matrix* pUser2Device,
-                                        const CFX_FloatRect& rcWindow,
-                                        uint32_t dwFlags) {}
-
 void CPDFSDK_WidgetHandler::OnDelete(CPDFSDK_Annot* pAnnot) {}
 
 void CPDFSDK_WidgetHandler::OnRelease(CPDFSDK_Annot* pAnnot) {}