diff --git a/config/initializers/000-rails-master-polyfills.rb b/config/initializers/000-rails-master-polyfills.rb
deleted file mode 100644
index baa94c3732b..00000000000
--- a/config/initializers/000-rails-master-polyfills.rb
+++ /dev/null
@@ -1,6 +0,0 @@
-if Rails.version < "4.2.0"
-  class Mail::Message
-    alias_method :deliver_now,  :deliver
-    alias_method :deliver_now!, :deliver!
-  end
-end