Remove unused function

src/hb-machinery.hh

@@ -797,11 +797,6 @@ struct hb_lazy_loader_t : hb_data_wrapper_t<Data, WheresData>
   inline const Returned & operator * (void) const { return *get (); }
   template <typename C> inline operator const C * (void) const { return get (); }
 
-  inline Data * get_data (void) const
-  {
-    return *(((Data **) this) - WheresData);
-  }
-
   inline Stored * get_stored (void) const
   {
   retry: