[qty.compat.traits] Remove wrong typename

Co-authored-by: Mateusz Pusz <[email protected]>

docs/api_reference/src/quantities.tex

@@ -2722,7 +2722,7 @@
   @\exposconceptnc{qty-like}@<T, quantity_point_like_traits> &&  //
   requires {
     typename quantity_point<quantity_point_like_traits<T>::reference,
-                            typename quantity_point_like_traits<T>::point_origin,
+                            quantity_point_like_traits<T>::point_origin,
                             typename quantity_point_like_traits<T>::rep>;
   };
 \end{itemdecl}