diff --git a/app/components/govuk_component/traits/custom_classes.rb b/app/components/govuk_component/traits/custom_classes.rb
deleted file mode 100644
index b4f5da8c..00000000
--- a/app/components/govuk_component/traits/custom_classes.rb
+++ /dev/null
@@ -1,4 +0,0 @@
-module GovukComponent
-  module Traits
-  end
-end
diff --git a/guide/lib/helpers.rb b/guide/lib/helpers.rb
index 5d1e2c08..bfe264a8 100644
--- a/guide/lib/helpers.rb
+++ b/guide/lib/helpers.rb
@@ -22,7 +22,6 @@
 
 require 'components/govuk_component'
 require 'components/govuk_component/traits'
-require 'components/govuk_component/traits/custom_classes'
 require 'components/govuk_component/traits/custom_html_attributes'
 require 'components/govuk_component/base'
 require 'components/govuk_component/accordion_component'