diff --git a/actionpack/lib/action_dispatch/http/response.rb b/actionpack/lib/action_dispatch/http/response.rb
index 195b1d4c6fba9..56792f6ba229e 100644
--- a/actionpack/lib/action_dispatch/http/response.rb
+++ b/actionpack/lib/action_dispatch/http/response.rb
@@ -502,10 +502,6 @@ def respond_to?(method, include_private = false)
       def to_path
         @response.stream.to_path
       end
-
-      def to_ary
-        nil
-      end
     end
 
     def handle_no_content!