Remove useless field

lib/vaccins/queries.ex

@@ -19,8 +19,7 @@ defmodule Vaccins.Queries do
       :practice_ids,
       :limit,
       insurance_sector: "public",
-      destroy_temporary: true,
-      _converter: Doctolib
+      destroy_temporary: true
     ]
 
     def new(kw_list),