Remove MediaProxyWarmingPolicy config for ConcurrentLimiter as we are not using it

config/config.exs

@@ -902,7 +902,6 @@
 
 config :pleroma, ConcurrentLimiter, [
   {Pleroma.Web.RichMedia.Helpers, [max_running: 5, max_waiting: 5]},
-  {Pleroma.Web.ActivityPub.MRF.MediaProxyWarmingPolicy, [max_running: 5, max_waiting: 5]},
   {Pleroma.Search, [max_running: 30, max_waiting: 50]}
 ]
 

lib/pleroma/web/activity_pub/mrf/media_proxy_warming_policy.ex

@@ -22,11 +22,7 @@ defp prefetch(url) do
 
       Logger.debug("Prefetching #{inspect(url)} as #{inspect(prefetch_url)}")
 
-      if Pleroma.Config.get(:env) == :test do
-        fetch(prefetch_url)
-      else
-        Task.start(fn -> fetch(prefetch_url) end)
-      end
+      fetch(prefetch_url)
     end
   end