activitypub: remove contain_timeline()

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -980,12 +980,4 @@ def contain_broken_threads(%Activity{} = activity, %User{} = user) do
   def contain_activity(%Activity{} = activity, %User{} = user) do
     contain_broken_threads(activity, user)
   end
-
-  # do post-processing on a timeline
-  def contain_timeline(timeline, user) do
-    timeline
-    |> Enum.filter(fn activity ->
-      contain_activity(activity, user)
-    end)
-  end
 end

lib/pleroma/web/mastodon_api/mastodon_api_controller.ex

@@ -303,7 +303,6 @@ def home_timeline(%{assigns: %{user: user}} = conn, params) do
     activities =
       [user.ap_id | user.following]
       |> ActivityPub.fetch_activities(params)
-      |> ActivityPub.contain_timeline(user)
       |> Enum.reverse()
 
     conn

lib/pleroma/web/twitter_api/twitter_api_controller.ex

@@ -101,9 +101,7 @@ def friends_timeline(%{assigns: %{user: user}} = conn, params) do
       |> Map.put("blocking_user", user)
       |> Map.put("user", user)
 
-    activities =
-      ActivityPub.fetch_activities([user.ap_id | user.following], params)
-      |> ActivityPub.contain_timeline(user)
+    activities = ActivityPub.fetch_activities([user.ap_id | user.following], params)
 
     conn
     |> put_view(ActivityView)