Undeprecate actionmailer delay, fixes #2186

Changes.md

@@ -1,3 +1,8 @@
+HEAD
+-----------
+
+- Undeprecate delay extension for ActionMailer 4.2+ . [#2186]
+
 3.3.2
 -----------
 

lib/sidekiq/extensions/action_mailer.rb

@@ -28,7 +28,6 @@ module Sidekiq
 
       def deliver(msg)
         if msg.respond_to?(:deliver_now)
-          ActiveSupport::Deprecation.warn('`ActionMailer.delay.method` is deprecated. Use `ActionMailer.method.deliver_later` instead and configure ActiveJob to use Sidekiq.')
           # Rails 4.2/5.0
           msg.deliver_now
         else