removed errorness ADL hook

[SVN r24568]

include/boost/range/empty.hpp

@@ -57,12 +57,7 @@ namespace range_detail
 template< class T >
 inline bool empty( const T& r )
 {
-#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))        
-    using range_detail::empty;
-    return empty( r );
-#else
     return range_detail::empty( r );
-#endif
 }
 
 } // namepace 'boost'