Lucy Lib: remove Network.initialize_infra as it's a noop

Author: glyh

src/app/test_executive/test_executive.ml

@@ -380,8 +380,6 @@ let main inputs =
           in
           (network, dsl)
         in
-        [%log trace] "initializing network abstraction" ;
-        let%bind () = Engine.Network.initialize_infra ~logger network in
 
         [%log info] "Starting the daemons within the pods" ;
         let start_print (node : Engine.Network.Node.t) =

src/lib/testing/integration_test_lib/intf.ml

@@ -115,8 +115,6 @@ module Engine = struct
     val genesis_keypairs : t -> Network_keypair.t Core.String.Map.t
 
     val genesis_keypair_exn : t -> String.t -> Network_keypair.t
-
-    val initialize_infra : logger:Logger.t -> t -> unit Malleable_error.t
   end
 
   module type Network_manager_intf = sig

src/lib/testing/integration_test_local_engine/docker_network.ml

@@ -331,8 +331,3 @@ let all_ids t =
   let deployments = all_nodes t |> Core.Map.to_alist in
   List.fold deployments ~init:[] ~f:(fun acc (_, node) ->
       List.cons node.config.service_id acc )
-
-let initialize_infra ~logger network =
-  let _ = logger in
-  let _ = network in
-  Malleable_error.return ()