improvement(promos): promo codes should be only stripe codes (#3591)

* improvement(promos): promo codes should be only stripe codes

* address comments

Author: icecrasher321

apps/sim/app/api/attribution/route.ts

@@ -103,7 +103,6 @@ export type {
   AdminOrganization,
   AdminOrganizationBillingSummary,
   AdminOrganizationDetail,
-  AdminReferralCampaign,
   AdminSeatAnalytics,
   AdminSingleResponse,
   AdminSubscription,
@@ -118,7 +117,6 @@ export type {
   AdminWorkspaceMember,
   DbMember,
   DbOrganization,
-  DbReferralCampaign,
   DbSubscription,
   DbUser,
   DbUserStats,
@@ -147,7 +145,6 @@ export {
   parseWorkflowVariables,
   toAdminFolder,
   toAdminOrganization,
-  toAdminReferralCampaign,
   toAdminSubscription,
   toAdminUser,
   toAdminWorkflow,