Hook unfollow into TwitterAPI

lib/pleroma/web/twitter_api/twitter_api.ex

@@ -36,14 +36,7 @@ def follow(%User{} = follower, params) do
   def unfollow(%User{} = follower, params) do
     with {:ok, %User{} = unfollowed} <- get_user(params),
          {:ok, follower, follow_activity} <- User.unfollow(follower, unfollowed),
-         {:ok, _activity} <-
-           ActivityPub.insert(%{
-             "type" => "Undo",
-             "actor" => follower.ap_id,
-             # get latest Follow for these users
-             "object" => follow_activity.data["id"],
-             "published" => make_date()
-           }) do
+         {:ok, _activity} <- ActivityPub.unfollow(follower, unfollowed) do
       {:ok, follower, unfollowed}
     else
       err -> err