Extract deactivated users query to a join

lib/pleroma/activity.ex

@@ -361,9 +361,11 @@ def following_requests_for_actor(%User{ap_id: ap_id}) do
   end
 
   def restrict_deactivated_users(query) do
-    deactivated_users_query = from(u in User.Query.build(%{deactivated: true}), select: u.ap_id)
-
-    from(activity in query, where: activity.actor not in subquery(deactivated_users_query))
+    query
+    |> join(:inner, [activity], user in User,
+      as: :user,
+      on: activity.actor == user.ap_id and user.is_active == true
+    )
   end
 
   defdelegate search(user, query, options \\ []), to: Pleroma.Activity.Search