aviate: update what_is_aviate

Author: sbrossie

userguide/aviate/what_is_aviate.adoc

@@ -5,12 +5,8 @@ include::{sourcedir}/aviate/includes/aviate-card.adoc[]
 == About Aviate
 Aviate is designed to deliver a seamless billing experience that builds upon the core capabilities of Kill Bill. Our goal is to provide users with advanced features that cover the entire quote-to-cash lifecycle, including enhanced system observability, streamlined configurations, and valuable business intelligence.
 
-== Beta Program Access
-As part of the Beta program, you'll have access to early feature releases directly on https://aviate.killbill.io[aviate.killbill.io]. This platform will continue to evolve with new functionalities aimed at making billing management easier and more powerful.
-
 == Aviate Plugin
-For Beta customers, we offer the *Aviate plugin*. This plugin extends Kill Bill with additional endpoints specifically for the Beta phase, allowing early access to some of Aviate's backend features. These endpoints are detailed in the *Aviate section* below.
 
-NOTE: Only users on the Flock plan and higher can download and install the plugin. Free/Entourage users can use the plugin in their sandbox deployment; however, they cannot download the plugin in their local environment.
+The Aviate plugin extends Kill Bill with additional endpoints as described in the *Aviate section* below. The plugin is available for users who have subscribed to our Flock plan, and it is also installed by default on our `sandbox` deployment available from https://aviate.killbill.io[aviate.killbill.io].
 
 Please refer to the documentation below to start integrating Aviate into your Kill Bill environment.