Remove unused m_nTabOrder in CPDFSDK_Annot.

fpdfsdk/cpdfsdk_annot.cpp

Index: fpdfsdk/cpdfsdk_annot.cpp
diff --git a/fpdfsdk/cpdfsdk_annot.cpp b/fpdfsdk/cpdfsdk_annot.cpp
index e0abe6f54e289b9a7ee54b3d55b972078fea444e..36bec1553e6ce2828a08a6d2fd496d95ce557a34 100644
--- a/fpdfsdk/cpdfsdk_annot.cpp
+++ b/fpdfsdk/cpdfsdk_annot.cpp
@@ -22,7 +22,7 @@ const float kMinHeight = 1.0f;
 }  // namespace
 
 CPDFSDK_Annot::CPDFSDK_Annot(CPDFSDK_PageView* pPageView)
-    : m_pPageView(pPageView), m_bSelected(FALSE), m_nTabOrder(-1) {}
+    : m_pPageView(pPageView), m_bSelected(FALSE) {}
 
 CPDFSDK_Annot::~CPDFSDK_Annot() {}
 
@@ -84,14 +84,6 @@ void CPDFSDK_Annot::SetSelected(FX_BOOL bSelected) {
   m_bSelected = bSelected;
 }
 
-int CPDFSDK_Annot::GetTabOrder() {
-  return m_nTabOrder;
-}
-
-void CPDFSDK_Annot::SetTabOrder(int iTabOrder) {
-  m_nTabOrder = iTabOrder;
-}
-
 UnderlyingPageType* CPDFSDK_Annot::GetUnderlyingPage() {
 #ifdef PDF_ENABLE_XFA
   return GetPDFXFAPage();