moved OAuth.Token.CleanWorker to Oban Periodic jobs

lib/pleroma/workers/cron/clear_oauth_token_worker.ex

@@ -0,0 +1,21 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Workers.Cron.ClearOauthTokenWorker do
+  @moduledoc """
+  The worker to clean an expired oauth tokens.
+  """
+
+  use Oban.Worker, queue: "background"
+
+  alias Pleroma.Config
+  alias Pleroma.Web.OAuth.Token
+
+  @impl Oban.Worker
+  def perform(_opts, _job) do
+    if Config.get([:oauth2, :clean_expired_tokens], false) do
+      Token.delete_expired_tokens()
+    end
+  end
+end