clean up

src/mlw/rust_printer.ml

@@ -561,7 +561,6 @@ module MLToRust = struct
     let (bf, be, _) =
       List.fold_left visit_starting_in (box_fields, box_enum, Sid.empty) itl in
     (bf, be)
-(*     union_res (List.map maybe_box itl) *)
 
   let translate_decl (info:info) (d:decl) : Rust.def list =
     match d with