removing Stats worker from Oban cron jobs

lib/pleroma/config/oban.ex

@@ -0,0 +1,30 @@
+defmodule Pleroma.Config.Oban do
+  require Logger
+
+  def warn do
+    oban_config = Pleroma.Config.get(Oban)
+
+    crontab =
+      [Pleroma.Workers.Cron.StatsWorker]
+      |> Enum.reduce(oban_config[:crontab], fn removed_worker, acc ->
+        with acc when is_list(acc) <- acc,
+             setting when is_tuple(setting) <-
+               Enum.find(acc, fn {_, worker} -> worker == removed_worker end) do
+          """
+          !!!OBAN CONFIG WARNING!!!
+          You are using old workers in Oban crontab settings, which were removed.
+          Please, remove setting from crontab in your config file (prod.secret.exs): #{
+            inspect(setting)
+          }
+          """
+          |> Logger.warn()
+
+          List.delete(acc, setting)
+        else
+          _ -> acc
+        end
+      end)
+
+    Pleroma.Config.put(Oban, Keyword.put(oban_config, :crontab, crontab))
+  end
+end