Remove unused one-arg form of IsAppearanceValid().

The no-arg form is used, however.

Change-Id: I33dcbe2a03d51d257d5b7c9b6018221cacffd632
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/65211
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

fpdfsdk/cpdfsdk_baannot.cpp

diff --git a/fpdfsdk/cpdfsdk_baannot.cpp b/fpdfsdk/cpdfsdk_baannot.cpp
index 459b9d3..e214163 100644
--- a/fpdfsdk/cpdfsdk_baannot.cpp
+++ b/fpdfsdk/cpdfsdk_baannot.cpp
@@ -78,25 +78,6 @@
   return !!GetAnnotDict()->GetDictFor(pdfium::annotation::kAP);
 }
 
-bool CPDFSDK_BAAnnot::IsAppearanceValid(CPDF_Annot::AppearanceMode mode) {
-  CPDF_Dictionary* pAP = GetAnnotDict()->GetDictFor(pdfium::annotation::kAP);
-  if (!pAP)
-    return false;
-
-  // Choose the right sub-ap
-  const char* ap_entry = "N";
-  if (mode == CPDF_Annot::Down)
-    ap_entry = "D";
-  else if (mode == CPDF_Annot::Rollover)
-    ap_entry = "R";
-  if (!pAP->KeyExist(ap_entry))
-    ap_entry = "N";
-
-  // Get the AP stream or subdirectory
-  CPDF_Object* psub = pAP->GetDirectObjectFor(ap_entry);
-  return !!psub;
-}
-
 void CPDFSDK_BAAnnot::SetAnnotName(const WideString& sName) {
   CPDF_Dictionary* pDict = GetAnnotDict();
   if (sName.IsEmpty())

fpdfsdk/cpdfsdk_baannot.h

diff --git a/fpdfsdk/cpdfsdk_baannot.h b/fpdfsdk/cpdfsdk_baannot.h
index 61272e5..482aa0a 100644
--- a/fpdfsdk/cpdfsdk_baannot.h
+++ b/fpdfsdk/cpdfsdk_baannot.h
@@ -35,7 +35,6 @@
 
   virtual CPDF_Action GetAAction(CPDF_AAction::AActionType eAAT);
   virtual bool IsAppearanceValid();
-  virtual bool IsAppearanceValid(CPDF_Annot::AppearanceMode mode);
   virtual void DrawAppearance(CFX_RenderDevice* pDevice,
                               const CFX_Matrix& mtUser2Device,
                               CPDF_Annot::AppearanceMode mode,