ML studio classic retire

Author: lgayhardt

articles/data-factory/v1/data-factory-use-custom-activities.md

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 There are two types of activities that you can use in an Azure Data Factory pipeline.
 
 - [Data Movement Activities](data-factory-data-movement-activities.md) to move data between [supported source and sink data stores](data-factory-data-movement-activities.md#supported-data-stores-and-formats).
-- [Data Transformation Activities](data-factory-data-transformation-activities.md) to transform data using compute services such as Azure HDInsight, Azure Batch, and Machine Learning Studio (classic).
+- [Data Transformation Activities](data-factory-data-transformation-activities.md) to transform data using compute services such as Azure HDInsight and Azure Batch.
 
 To move data to/from a data store that Data Factory does not support, create a **custom activity** with your own data movement logic and use the activity in a pipeline. Similarly, to transform/process data in a way that isn't supported by Data Factory, create a custom activity with your own data transformation logic and use the activity in a pipeline.
 
@@ -1027,7 +1027,6 @@ The [Azure Data Factory - local environment](https://github.com/gbrueckl/Azure.D
 | Sample | What custom activity does |
 | --- | --- |
 | [HTTP Data Downloader](https://github.com/Azure/Azure-DataFactory/tree/master/SamplesV1/HttpDataDownloaderSample). |Downloads data from an HTTP Endpoint to Azure Blob Storage using custom C# Activity in Data Factory. |
-| [Twitter Sentiment Analysis sample](https://github.com/Azure/Azure-DataFactory/tree/master/SamplesV1/TwitterAnalysisSample-CustomC%23Activity) |Invokes an Machine Learning Studio (classic) model and do sentiment analysis, scoring, prediction etc. |
 | [Run R Script](https://github.com/Azure/Azure-DataFactory/tree/master/SamplesV1/RunRScriptUsingADFSample). |Invokes R script by running RScript.exe on your HDInsight cluster that already has R Installed on it. |
 | [Cross AppDomain .NET Activity](https://github.com/Azure/Azure-DataFactory/tree/master/SamplesV1/CrossAppDomainDotNetActivitySample) |Uses different assembly versions from ones used by the Data Factory launcher |
 | [Reprocess a model in Azure Analysis Services](https://github.com/Azure/Azure-DataFactory/tree/master/SamplesV1/AzureAnalysisServicesProcessSample) |  Reprocesses a model in Azure Analysis Services. |