Update get-started-with-closed-captions.md

remove public preview banner

Author: valindrae

articles/communication-services/quickstarts/voice-video-calling/get-started-with-closed-captions.md

@@ -14,9 +14,6 @@ ms.custom: mode-api, devx-track-js
 
 # QuickStart: Add closed captions to your calling app
 
-
-[!INCLUDE [Public Preview Disclaimer](../../includes/public-preview-include-document.md)]
-
 ::: zone pivot="platform-web"
 [!INCLUDE [Closed Captions for Web](./includes/closed-captions/closed-captions-javascript.md)]
 ::: zone-end