add data_file.ml

src/config.ml

@@ -175,17 +175,6 @@ module Coin = struct
     }
 
   let all_coins = List.map parse_coin coin_sections
-
-  let get_coin name =
-    match List.find_opt (fun v -> v.section_name = name) all_coins with
-    | None ->
-        fail_with
-          (Fmt.str "section `[coin_%s]` not found, coin `%s` is not defined"
-             name name)
-    | Some v -> v
-
-  let kudo_1 = get_coin "kudo_1"
-  let kudo_2 = get_coin "kudo_2"
 end
 
 module Exchange_secmod_rsa = struct