docs: Update Performance Insights (remove call to CX)

Author: igorlukanin

docs/pages/product/workspace/performance.mdx

@@ -8,9 +8,7 @@ or if you face any performance-related issues with your deployment.
 <SuccessBox>
 
 Performance Insights are available in Cube Cloud on [Premium and above
-tiers](https://cube.dev/pricing). Please contact us through the in-product
-chat or check with your dedicated CSM to enable Performance Insights in
-your account.
+tiers](https://cube.dev/pricing).
 
 </SuccessBox>
 
@@ -160,4 +158,4 @@ for queries and jobs.
 [ref-multitenancy]: /product/configuration/advanced/multitenancy
 [ref-context-to-app-id]: /reference/configuration/config#context_to_app_id
 [ref-cache-types]: /product/caching#cache-type
-[ref-indexes]: /product/caching/using-pre-aggregations#using-indexes
+[ref-indexes]: /product/caching/using-pre-aggregations#using-indexes