We don't need to clear action_methods on inherited hook as they are cleaned on method_added hook

actionmailer/lib/action_mailer/base.rb

@@ -361,11 +361,6 @@ class Base < AbstractController::Base
     }.freeze
 
     class << self
-      def inherited(klass)
-        super(klass)
-        klass.clear_action_methods!
-      end
-
       def mailer_name
         @mailer_name ||= name.underscore
       end