Update admin readme

sdk/communication/azure-communication-administration/README.md

@@ -2,7 +2,7 @@
 
 # Azure Communication Administration Package client library for Python
 
-Azure Communication Administration client package is intended to be used to setup the basics for opening a way to use Azure Communication Service offerings. This package helps to create identities user tokens to be used by other client packages such as chat, calling, sms. 
+Azure Communication Administration client package is used to administer Phone Numbers. 
 
 # Getting started
 ### Prerequisites
@@ -17,31 +17,6 @@ pip install azure-communication-administration
 ```
 
 # Key concepts
-## CommunicationIdentityClient
-`CommunicationIdentityClient` provides operations for:
-
-- Create/delete identities to be used in Azure Communication Services. Those identities can be used to make use of Azure Communication offerings and can be scoped to have limited abilities through token scopes.
-
-- Create/revoke scoped user access tokens to access services such as chat, calling, sms. Tokens are issued for a valid Azure Communication identity and can be revoked at any time.
-
-### Initializing Identity Client
-```python
-# You can find your endpoint and access token from your resource in the Azure Portal
-import os
-from azure.communication.administration import CommunicationIdentityClient
-from azure.identity import DefaultAzureCredential
-
-connection_str = os.getenv('AZURE_COMMUNICATION_SERVICE_CONNECTION_STRING')
-endpoint = os.getenv('AZURE_COMMUNICATION_SERVICE_ENDPOINT')
-
-# To use Azure Active Directory Authentication (DefaultAzureCredential) make sure to have
-# AZURE_TENANT_ID, AZURE_CLIENT_ID and AZURE_CLIENT_SECRET as env variables.
-identity_client_managed_identity = CommunicationIdentityClient.(endpoint, DefaultAzureCredential())
-
-#You can also authenticate using your connection string
-identity_client = CommunicationIdentityClient.from_connection_string(connection_str)
-
-```
 
 ## CommunicationPhoneNumberClient
 ### Initializing Phone Number Client
@@ -70,10 +45,6 @@ Phone numbers can be assigned to a callback URL via the configure number API. As
 # Examples
 The following section provides several code snippets covering some of the most common Azure Communication Services tasks, including:
 
-[Create/delete Azure Communication Service identities][identitysamples] 
-
-[Create/revoke scoped user access tokens][identitysamples]
-
 ## Communication Phone number
 ### Get Countries
 
@@ -179,12 +150,12 @@ poller = phone_number_administration_client.begin_purchase_reservation(
 ```
 
 # Troubleshooting
-The Azure Communication Service Identity client will raise exceptions defined in [Azure Core][azure_core].
+The Phone Number Administration client will raise exceptions defined in [Azure Core][azure_core].
 
 # Next steps
 ## More sample code
 
-Please take a look at the [samples](https://github.com/Azure/azure-sdk-for-python/tree/master/sdk/communication/azure-communication-administration/samples) directory for detailed examples of how to use this library to manage identities and tokens.
+Please take a look at the [samples](https://github.com/Azure/azure-sdk-for-python/tree/master/sdk/communication/azure-communication-administration/samples) directory for detailed examples of how to use this library.
 
 ## Provide Feedback
 
@@ -201,5 +172,4 @@ This project has adopted the [Microsoft Open Source Code of Conduct](https://ope
 For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or contact [[email protected]](mailto:[email protected]) with any additional questions or comments.
 
 <!-- LINKS -->
-[identitysamples]: https://github.com/Azure/azure-sdk-for-python/blob/master/sdk/communication/azure-communication-administration/samples/identity_samples.py
 [azure_core]: https://github.com/Azure/azure-sdk-for-python/blob/master/sdk/core/azure-core/README.md