Remove Stripe customer number

Remove Stripe customer number from billing concept temers

Author: oliwolff1

src/content/docs/billing/about-billing/billing-concepts-terms.mdx

@@ -25,7 +25,6 @@ deprecated: false
 
 - **Customer ID** - A `customer_id` uniquely identifies a user or org who has signed up to a plan. This is different to a `user_id` or `org_id` that identifies the user or org as an entity. 
 - **Customer Agreement ID** - A `customer_agreement_id` identifies the contract or agreement created in Stripe when a plan is signed up to. The agreement ID is then associated with the `customer_id` in Kinde.
-- **Stripe customer number** - A customer number is automatcially generated in Stripe when a customer signs up to a plan. You don't need this number to interact or do anything in Kinde. The Stripe customer number looks like this - `cus_SobqVb484c2xxx`.
 
 ## Key concepts