remove spurious friend and forward-decl

Change-Id: Iaba7852af44248b5479e5ea0c7ccf51561df4c2d

sw/inc/calbck.hxx

@@ -31,7 +31,6 @@
 
 
 class SwModify;
-class SwClientIter;
 class SfxPoolItem;
 class SfxHint;
 
@@ -79,7 +78,6 @@ namespace sw
     class SW_DLLPUBLIC WriterListener : ::boost::noncopyable
     {
         friend class ::SwModify;
-        friend class ::SwClient;
         friend class ::sw::ClientIteratorBase;
         private:
             WriterListener* m_pLeft;