diff --git a/toolkit/components/places/src/nsNavHistory.cpp b/toolkit/components/places/src/nsNavHistory.cpp
index c8d6d09a5cf..6e5809de455 100644
--- a/toolkit/components/places/src/nsNavHistory.cpp
+++ b/toolkit/components/places/src/nsNavHistory.cpp
@@ -5124,36 +5124,6 @@ nsNavHistory::UnregisterOpenPage(nsIURI* aURI)
 }
 
 
-NS_IMETHODIMP
-nsNavHistory::UnregisterOpenPage(nsIURI* aURI)
-{
-  NS_ASSERTION(NS_IsMainThread(), "This can only be called on the main thread");
-  NS_ENSURE_ARG(aURI);
-
-  // Entering Private Browsing mode will unregister all open pages, therefore
-  // there shouldn't be anything in the moz_openpages_temp table. So we can stop
-  // now without doing any unnecessary work.
-  if (InPrivateBrowsingMode())
-    return NS_OK;
-
-  PRInt64 placeId;
-  nsresult rv = GetUrlIdFor(aURI, &placeId, PR_FALSE);
-  NS_ENSURE_SUCCESS(rv, rv);
-  if (placeId == 0)
-    return NS_OK;
-
-  mozStorageStatementScoper scoper(mDBUnregisterOpenPage);
-
-  rv = mDBUnregisterOpenPage->BindInt64Parameter(0, placeId);
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  rv = mDBUnregisterOpenPage->Execute();
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  return NS_OK;
-}
-
-
 // nsNavHistory::SetCharsetForURI
 //
 // Sets the character-set for a URI.