Bug 459776 - date formatter is unused

This changeset removes a small part of code that places does in startup that is
not used or needed.
r=dietrich

toolkit/components/places/src/nsNavHistory.cpp

@@ -462,10 +462,6 @@ nsNavHistory::Init()
       getter_AddRefs(mBundle));
   NS_ENSURE_SUCCESS(rv, rv);
 
-  // date formatter
-  mDateFormatter = do_CreateInstance(NS_DATETIMEFORMAT_CONTRACTID, &rv);
-  NS_ENSURE_SUCCESS(rv, rv);
-
   // initialize idle timer
   InitializeIdleTimer();
 

toolkit/components/places/src/nsNavHistory.h

@@ -250,8 +250,6 @@ public:
   nsIStringBundle* GetBundle()
     { return mBundle; }
   nsICollation* GetCollation();
-  nsIDateTimeFormat* GetDateFormatter()
-    { return mDateFormatter; }
   void GetStringFromName(const PRUnichar* aName, nsACString& aResult);
 
   // returns true if history has been disabled
@@ -634,7 +632,6 @@ protected:
   // localization
   nsCOMPtr<nsIStringBundle> mBundle;
   nsCOMPtr<nsICollation> mCollation;
-  nsCOMPtr<nsIDateTimeFormat> mDateFormatter;
 
   // annotation service : MAY BE NULL!
   //nsCOMPtr<mozIAnnotationService> mAnnotationService;