Update audio streaming quickstart documentation

Removed note about public preview status from quickstart.

Author: alessandro-avila

articles/communication-services/how-tos/call-automation/audio-streaming-quickstart.md

@@ -16,8 +16,6 @@ zone_pivot_groups: acs-js-csharp-java-python
 
 Get started with using audio streams through Azure Communication Services Audio Streaming API. This quickstart assumes you're already familiar with Call Automation APIs to build an automated call routing solution. 
 
-Functionality described in this quickstart is currently in public preview.
-
 ::: zone pivot="programming-language-csharp"
 [!INCLUDE [Audio Streaming with .NET](./includes//audio-streaming-quickstart-csharp.md)]
 ::: zone-end