remove studio(classic)

Author: sdgilley

articles/machine-learning/index.yml

@@ -134,6 +134,4 @@ landingContent:
         - text: Python SDK (v2) code examples
           url: https://github.com/Azure/azureml-examples/blob/main/sdk/python/README.md
         - text: CLI (v2) code examples
-          url: https://github.com/Azure/azureml-examples/blob/main/cli/README.md
-        - text: ML Studio (classic) documentation
-          url: ./classic/index.yml
+          url: https://github.com/Azure/azureml-examples/blob/main/cli/README.md