use default child_specs

lib/pleroma/web/chat_channel.ex

@@ -33,9 +33,11 @@ defmodule Pleroma.Web.ChatChannel do
 end
 
 defmodule Pleroma.Web.ChatChannel.ChatChannelState do
+  use Agent
+
   @max_messages 20
 
-  def start_link do
+  def start_link(_) do
     Agent.start_link(fn -> %{max_id: 1, messages: []} end, name: __MODULE__)
   end
 

lib/pleroma/web/federator/retry_queue.ex

@@ -13,7 +13,7 @@ defmodule Pleroma.Web.Federator.RetryQueue do
     {:ok, %{args | queue_table: queue_table, running_jobs: :sets.new()}}
   end
 
-  def start_link do
+  def start_link(_) do
     enabled =
       if Pleroma.Config.get(:env) == :test,
         do: true,

lib/pleroma/web/oauth/token/clean_worker.ex

@@ -6,6 +6,7 @@ defmodule Pleroma.Web.OAuth.Token.CleanWorker do
   @moduledoc """
   The module represents functions to clean an expired oauth tokens.
   """
+  use GenServer
 
   # 10 seconds
   @start_interval 10_000
@@ -18,7 +19,7 @@ defmodule Pleroma.Web.OAuth.Token.CleanWorker do
 
   alias Pleroma.Web.OAuth.Token
 
-  def start_link, do: GenServer.start_link(__MODULE__, nil)
+  def start_link(_), do: GenServer.start_link(__MODULE__, nil)
 
   def init(_) do
     if Pleroma.Config.get([:oauth2, :clean_expired_tokens], false) do

lib/pleroma/web/streamer.ex

@@ -18,7 +18,7 @@ defmodule Pleroma.Web.Streamer do
 
   @keepalive_interval :timer.seconds(30)
 
-  def start_link do
+  def start_link(_) do
     GenServer.start_link(__MODULE__, %{}, name: __MODULE__)
   end