Merge branch 'chat-relation-constraints' into 'develop'

Chats: Add cascading delete on both referenced users.

See merge request pleroma/pleroma!2934

lib/pleroma/web/pleroma_api/controllers/chat_controller.ex

@@ -149,9 +149,7 @@ defmodule Pleroma.Web.PleromaAPI.ChatController do
       from(c in Chat,
         where: c.user_id == ^user_id,
         where: c.recipient not in ^blocked_ap_ids,
-        order_by: [desc: c.updated_at],
-        inner_join: u in User,
-        on: u.ap_id == c.recipient
+        order_by: [desc: c.updated_at]
       )
       |> Repo.all()