diff --git a/app/helpers/mailer_helper.rb b/app/helpers/mailer_helper.rb
deleted file mode 100644
index b7e3a8da3..000000000
--- a/app/helpers/mailer_helper.rb
+++ /dev/null
@@ -1,4 +0,0 @@
-# frozen_string_literal: true
-
-module MailerHelper
-end
diff --git a/app/mailers/application_mailer.rb b/app/mailers/application_mailer.rb
index bf161b9be..cc585c3b7 100644
--- a/app/mailers/application_mailer.rb
+++ b/app/mailers/application_mailer.rb
@@ -5,7 +5,6 @@ class ApplicationMailer < ActionMailer::Base
 
   helper :application
   helper :instance
-  helper :mailer
 
   protected