diff --git a/app/lib/signed_request.rb b/app/lib/signed_request.rb
index 0ee47ddae1..31ac7e4b76 100644
--- a/app/lib/signed_request.rb
+++ b/app/lib/signed_request.rb
@@ -1,8 +1,6 @@
 # frozen_string_literal: true
 
 class SignedRequest
-  include DomainControlHelper
-
   EXPIRATION_WINDOW_LIMIT = 12.hours
   CLOCK_SKEW_MARGIN       = 1.hour