Make record_declaration_dependency side-effectful

Author: liam923

src/ocaml/typing/cmt_format.ml

@@ -477,13 +477,9 @@ let add_saved_type b = saved_types := b :: !saved_types
 let get_saved_types () = !saved_types
 let set_saved_types l = saved_types := l
 
-(*
 let record_declaration_dependency (rk, uid1, uid2) =
   if not (Uid.equal uid1 uid2) then
     uids_deps := (rk, uid1, uid2) :: !uids_deps
-*)
-
-let record_declaration_dependency (_rk, _uid1, _uid2) = ()
 
 let save_cmt target cu binary_annots initial_env cmi shape =
   if !Clflags.binary_annotations && not !Clflags.print_types then begin