app/controllers/mailkick/subscriptions_controller.rb in mailkick-0.3.1 vs app/controllers/mailkick/subscriptions_controller.rb in mailkick-0.4.0

@@ -29,14 +29,10 @@
         email: @email,
         user: @user,
         list: @list
       }
     rescue ActiveSupport::MessageVerifier::InvalidSignature
-      if Rails::VERSION::MAJOR >= 5
-        render plain: "Subscription not found", status: :bad_request
-      else
-        render text: "Subscription not found", status: :bad_request
-      end
+      render plain: "Subscription not found", status: :bad_request
     end
 
     def opted_out?
       Mailkick.opted_out?(@options)
     end