Merge pull request #297494 from SharonZhang1/update0402

remove three types of services

Author: prmerger-automator[bot]

articles/synapse-analytics/spark/apache-spark-secure-credentials-with-tokenlibrary.md

@@ -494,9 +494,6 @@ While Azure Synapse Analytics supports various linked service connections (from
 | `Azure Data Lake Store` | `DataLakeStore`                       |
 | `Azure Data Factory` | `ADF`        |
 | `Azure Data Explorer` | `AzureDataExplorer`                   |
-| `Azure Database for MySQL` | `AzureOSSDB` |
-| `Azure Database for MariaDB` | `AzureOSSDB` |
-| `Azure Database for PostgreSQL` | `AzureOSSDB` |
 
 #### Unsupported linked service access from the Spark runtime