Remove instance variables from helper usage (#24203)

app/lib/activitypub/activity/delete.rb

@@ -21,7 +21,7 @@ class ActivityPub::Activity::Delete < ActivityPub::Activity
     return if object_uri.nil?
 
     with_lock("delete_status_in_progress:#{object_uri}", raise_on_failure: false) do
-      unless invalid_origin?(object_uri)
+      unless non_matching_uri_hosts?(@account.uri, object_uri)
         # This lock ensures a concurrent `ActivityPub::Activity::Create` either
         # does not create a status at all, or has finished saving it to the
         # database before we try to load it.