Update azure-ad-authentication.md

Author: lzchen

articles/azure-monitor/app/azure-ad-authentication.md

@@ -235,65 +235,6 @@ After setting it, restart your application. It now sends telemetry to Applicatio
 
 Azure Monitor OpenTelemetry Distro and Azure monitor OpenTelemery exporters for Python support the credential classes provided by [Azure Identity](https://github.com/Azure/azure-sdk-for-js/tree/master/sdk/identity/identity#credential-classes).
 
-- We recommend `DefaultAzureCredential` for local development.
-- We recommend `ManagedIdentityCredential` for system-assigned and user-assigned managed identities.
-  - For system-assigned, use the default constructor without parameters.
-  - For user-assigned, provide the client ID to the constructor.
-- We recommend `ClientSecretCredential` for service principals.
-  - Provide the tenant ID, client ID, and client secret to the constructor.
-
-If using `azure-monitor-opentelemetry`
-```python
-import os
-# You will need to install azure-identity
-from azure.identity import ManagedIdentityCredential
-from azure.monitor.opentelemetry import configure_azure_monitor
-from opentelemetry import trace
-
-credential = ManagedIdentityCredential(client_id="<client_id>")
-configure_azure_monitor(
-  connection_string=os.environ["APPLICATIONINSIGHTS_CONNECTION_STRING"],
-  credential=credential,
-)
-
-tracer = trace.get_tracer(__name__)
-
-with tracer.start_as_current_span("hello"):
-    print("Hello, World!")
-
-```
-
-If using `azure-monitor-opentelemetry-exporter`
-```python
-import os
-# You will need to install azure-identity
-from azure.identity import ClientSecretCredential
-from opentelemetry import trace
-from opentelemetry.sdk.trace import TracerProvider
-from opentelemetry.sdk.trace.export import BatchSpanProcessor
-
-from azure.monitor.opentelemetry.exporter import AzureMonitorTraceExporter
-
-credential = ClientSecretCredential(
-    tenant_id="<tenant_id",
-    client_id="<client_id>",
-    client_secret="<client_secret>",
-)
-exporter = AzureMonitorTraceExporter.from_connection_string(
-    os.environ["APPLICATIONINSIGHTS_CONNECTION_STRING"],
-    credential=credential
-)
-
-trace.set_tracer_provider(TracerProvider())
-tracer = trace.get_tracer(__name__)
-span_processor = BatchSpanProcessor(exporter)
-trace.get_tracer_provider().add_span_processor(span_processor)
-
-with tracer.start_as_current_span("hello with aad managed identity"):
-    print("Hello, World!")
-
-```
-
 To configure using OpenCensus (deprecated), see [Configure and enable Microsoft Entra ID-based authentication](/previous-versions/azure/azure-monitor/app/opencensus-python#configure-and-enable-microsoft-entra-id-based-authentication).
 
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