comment Ast_derive_dyn which is unused

Author: bobzhang

jscomp/syntax/ast_derive_dyn.ml

@@ -21,7 +21,7 @@
  * You should have received a copy of the GNU Lesser General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *)
-
+(* 
 open Ast_helper
 
 let not_supported loc =
@@ -355,4 +355,4 @@ let init ()  =
              end
 
          }
-     end
+     end *)

jscomp/syntax/ast_derive_dyn.mli

@@ -1,2 +1,2 @@
-(* *)
-val init : unit -> unit
+
+(* val init : unit -> unit *)