Update introduction.mdx

Signed-off-by: tcaldwell-x <tcaldwell@twitter.com>

Author: tcaldwell-x

x-api/introduction.mdx

@@ -133,7 +133,6 @@ The X API uses **pay-per-usage** pricing. No subscriptions, no monthly caps—pa
 | Version | Status | Description |
 |:--------|:-------|:------------|
 | **v2** | Current | Modern endpoints, flexible pricing, all new features |
-| **v1.1** | Legacy | Limited support, some endpoints still available |
 | **Enterprise** | Available | High-volume access with dedicated support |
 
 <Tip>