don't show coupon area for upgrades

services/web/public/coffee/main/account-upgrade.coffee

@@ -12,6 +12,6 @@ define [
 					ga?('send', 'event', 'subscription-funnel', 'upgraded-free-trial', source)
 					url = "/user/subscription/new?planCode=#{planName}_free_trial_7_days&ssp=#{planName == 'collaborator'}"
 					if couponCode?
-						url = "#{url}&cc=#{couponCode}&scf=true"
+						url = "#{url}&cc=#{couponCode}"
 					window.open(url)
 					$scope.startedFreeTrial = true