Remove preview notice

Author: pavelprystinka

articles/communication-services/concepts/ui-library/includes/mobile-ui-use-cases.md

@@ -127,8 +127,6 @@ Call and chat client libraries must have the context for the call they join. Lik
 
 ## Troubleshooting guide
 
-[!INCLUDE [Public Preview Notice](../../../includes/public-preview-include.md)]
-
 When troubleshooting happens for voice or video calls, you may be asked to provide a **CallID**; this ID is used to identify Communication Services calls.
 
 This CallID can be retrieved via the action bar on the bottom of the call screen; you'll see an ellipsis button; once the user performs the tap action an option of ***"Share diagnostics info"***; the user will have the capability to share **the diagnostics info** that will be required to track  any issues by the support team.