diff --git a/src/lib_openapi/api.ml b/src/lib_openapi/api.ml
index 9b1f4b36d5ec6447b662a98e6dcd6a57183771f0..9ed20247318e56119e3234137bf765452a1143e0 100644
--- a/src/lib_openapi/api.ml
+++ b/src/lib_openapi/api.ml
@@ -35,13 +35,7 @@ let fail x = Printf.ksprintf failwith x
 
 (* First, we parse up to services. *)
 
-type arg = {
-  json : Json.t;
-  (* arg as JSON, used by rpcdiff; we could remove this *)
-  id : string;
-  name : string;
-  descr : string option;
-}
+type arg = {id : string; name : string; descr : string option}
 
 type 'a tree = Static of 'a static | Dynamic of Json.t
 
@@ -67,7 +61,6 @@ let opt_mandatory name json = function
 let parse_arg (json : Json.t) : arg =
   Json.as_record json @@ fun get ->
   {
-    json;
     id = get "id" |> opt_mandatory "id" json |> Json.as_string;
     name = get "name" |> opt_mandatory "name" json |> Json.as_string;
     descr = get "descr" |> Option.map Json.as_string;
diff --git a/src/lib_openapi/convert.ml b/src/lib_openapi/convert.ml
index d485f17514bab9cf4dead0733271800770ce7afb..5c43cb4fa216e03b023280787b131a09b718ee3a 100644
--- a/src/lib_openapi/convert.ml
+++ b/src/lib_openapi/convert.ml
@@ -283,7 +283,6 @@ let convert_service expected_path expected_method
       "expected method %s but found %s"
       (Method.to_http_string expected_method)
       (Method.to_http_string meth) ;
-  (* TODO: in practice [expected_path <> path]. Investigate why. *)
   if expected_path <> path then
     warn
       "expected path %s but found %s"