Remove an unused CXFA_FFDoc method.

Change-Id: If2a8e608498c505440405e7eff675969ac4b195a
Reviewed-on: https://pdfium-review.googlesource.com/12330
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/xfa/fxfa/cxfa_ffdoc.cpp b/xfa/fxfa/cxfa_ffdoc.cpp
index 3ed0ea0..4755a17 100644
--- a/xfa/fxfa/cxfa_ffdoc.cpp
+++ b/xfa/fxfa/cxfa_ffdoc.cpp
@@ -282,11 +282,6 @@
   return m_DocView.get();
 }
 
-bool CXFA_FFDoc::OpenDoc(const CFX_RetainPtr<IFX_SeekableStream>& pStream) {
-  m_pStream = pStream;
-  return true;
-}
-
 bool CXFA_FFDoc::OpenDoc(CPDF_Document* pPDFDoc) {
   if (!pPDFDoc)
     return false;
diff --git a/xfa/fxfa/cxfa_ffdoc.h b/xfa/fxfa/cxfa_ffdoc.h
index a43dae3..984d8b6 100644
--- a/xfa/fxfa/cxfa_ffdoc.h
+++ b/xfa/fxfa/cxfa_ffdoc.h
@@ -61,7 +61,6 @@
 
   CXFA_FFDocView* CreateDocView();
 
-  bool OpenDoc(const CFX_RetainPtr<IFX_SeekableStream>& pStream);
   bool OpenDoc(CPDF_Document* pPDFDoc);
   void CloseDoc();