Remove m_pOccontent from CPDFSDK_Document

Unused, remove.

Review-Url: https://codereview.chromium.org/2397513003
diff --git a/fpdfsdk/cpdfsdk_document.cpp b/fpdfsdk/cpdfsdk_document.cpp
index c597a1d..677dd83 100644
--- a/fpdfsdk/cpdfsdk_document.cpp
+++ b/fpdfsdk/cpdfsdk_document.cpp
@@ -128,14 +128,6 @@
   return FALSE;
 }
 
-CPDF_OCContext* CPDFSDK_Document::GetOCContext() {
-  if (!m_pOccontent) {
-    m_pOccontent.reset(
-        new CPDF_OCContext(GetPDFDocument(), CPDF_OCContext::View));
-  }
-  return m_pOccontent.get();
-}
-
 void CPDFSDK_Document::RemovePageView(UnderlyingPageType* pUnderlyingPage) {
   auto it = m_pageMap.find(pUnderlyingPage);
   if (it == m_pageMap.end())
diff --git a/fpdfsdk/cpdfsdk_document.h b/fpdfsdk/cpdfsdk_document.h
index 921a8df..3da229c 100644
--- a/fpdfsdk/cpdfsdk_document.h
+++ b/fpdfsdk/cpdfsdk_document.h
@@ -16,7 +16,6 @@
 #include "fpdfsdk/fsdk_define.h"
 #include "public/fpdf_formfill.h"
 
-class CPDF_OCContext;
 class CPDFSDK_FormFillEnvironment;
 class CPDFSDK_InterForm;
 class CPDFSDK_PageView;
@@ -93,7 +92,6 @@
   CPDFSDK_FormFillEnvironment* GetEnv() { return m_pEnv; }
   void ProcJavascriptFun();
   FX_BOOL ProcOpenAction();
-  CPDF_OCContext* GetOCContext();
 
  private:
   std::map<UnderlyingPageType*, CPDFSDK_PageView*> m_pageMap;
@@ -101,7 +99,6 @@
   std::unique_ptr<CPDFSDK_InterForm> m_pInterForm;
   CPDFSDK_Annot::ObservedPtr m_pFocusAnnot;
   CPDFSDK_FormFillEnvironment* m_pEnv;
-  std::unique_ptr<CPDF_OCContext> m_pOccontent;
   FX_BOOL m_bChangeMask;
   FX_BOOL m_bBeingDestroyed;
 };