Remove aliases that don't do anything

Thx @chocobozzz

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/mobilizon_web/controllers/node_info_controller.ex

@@ -1,7 +1,6 @@
 defmodule MobilizonWeb.NodeInfoController do
   use MobilizonWeb, :controller
 
-  alias MobilizonWeb
   alias Mobilizon.{Actors, Events}
 
   @instance Application.get_env(:mobilizon, :instance)

lib/service/activity_pub/utils.ex

@@ -12,7 +12,6 @@ defmodule Mobilizon.Service.ActivityPub.Utils do
   alias Mobilizon.Events.Comment
   alias Mobilizon.Events
   alias Mobilizon.Activity
-  alias MobilizonWeb
   alias Mobilizon.Service.ActivityPub
   alias Ecto.{Changeset, UUID}
   require Logger