Remove unused IPDFSDK_AnnotHandler::OnDrawSleep.

fpdfsdk/cpdfsdk_baannothandler.cpp

Index: fpdfsdk/cpdfsdk_baannothandler.cpp
diff --git a/fpdfsdk/cpdfsdk_baannothandler.cpp b/fpdfsdk/cpdfsdk_baannothandler.cpp
index 2ce69f97ce55b15a888e36e8027a0495673eeab0..10071045ff777d6acb4ff645529fcc8be55c0d51 100644
--- a/fpdfsdk/cpdfsdk_baannothandler.cpp
+++ b/fpdfsdk/cpdfsdk_baannothandler.cpp
@@ -71,13 +71,6 @@ void CPDFSDK_BAAnnotHandler::OnDraw(CPDFSDK_PageView* pPageView,
       pDevice, pUser2Device, CPDF_Annot::Normal, nullptr);
 }
 
-void CPDFSDK_BAAnnotHandler::OnDrawSleep(CPDFSDK_PageView* pPageView,
-                                         CPDFSDK_Annot* pAnnot,
-                                         CFX_RenderDevice* pDevice,
-                                         CFX_Matrix* pUser2Device,
-                                         const CFX_FloatRect& rcWindow,
-                                         uint32_t dwFlags) {}
-
 void CPDFSDK_BAAnnotHandler::OnDelete(CPDFSDK_Annot* pAnnot) {}
 
 void CPDFSDK_BAAnnotHandler::OnRelease(CPDFSDK_Annot* pAnnot) {}