Remove public preview note from iOS file

Author: jsaurezlee-msft

articles/communication-services/how-tos/calling-sdk/includes/call-transcription/call-transcription-ios.md

@@ -9,8 +9,6 @@ ms.author: rifox
 
 > [!WARNING]
 > Up until version 1.1.0 and beta release version 1.1.0-beta.1 of the Azure Communication Services Calling iOS SDK has the `isTranscriptionActive` as part of the `Call` object and `didChangeTranscriptionState` is part of `CallDelegate` delegate. For new beta releases, those APIs have been moved as an extended feature of `Call` just like described below.
-> [!NOTE]
-> This API is provided as a preview for developers and may change based on feedback that we receive. Do not use this API in a production environment. To use this api please use 'beta' release of Azure Communication Services Calling iOS SDK
 
 Call transcription is an extended feature of the core `Call` object. You first need to obtain the transcription feature object: