Fix infinite re-forwarding of update activities temporarily (#17698)

app/lib/activitypub/activity/update.rb

@@ -26,11 +26,6 @@ class ActivityPub::Activity::Update < ActivityPub::Activity
 
     return if @status.nil?
 
-    forwarder.forward! if forwarder.forwardable?
     ActivityPub::ProcessStatusUpdateService.new.call(@status, @object)
   end
-
-  def forwarder
-    @forwarder ||= ActivityPub::Forwarder.new(@account, @json, @status)
-  end
 end