Remove user-based OAuth part

Author: Clare-Zheng82

articles/data-factory/connector-rest.md

@@ -79,7 +79,7 @@ The following properties are supported for the REST linked service:
 | type | The **type** property must be set to **RestService**. | Yes |
 | url | The base URL of the REST service. | Yes |
 | enableServerCertificateValidation | Whether to validate server-side TLS/SSL certificate when connecting to the endpoint. | No<br /> (the default is **true**) |
-| authenticationType | Type of authentication used to connect to the REST service. Allowed values are **Anonymous**, **Basic**, **AadServicePrincipal**, **OAuth2ClientCredential**, and **ManagedServiceIdentity**. User-based OAuth isn't supported. You can additionally configure authentication headers in `authHeader` property. Refer to corresponding sections below on more properties and examples respectively.| Yes |
+| authenticationType | Type of authentication used to connect to the REST service. Allowed values are **Anonymous**, **Basic**, **AadServicePrincipal**, **OAuth2ClientCredential**, and **ManagedServiceIdentity**. You can additionally configure authentication headers in `authHeader` property. Refer to corresponding sections below on more properties and examples respectively.| Yes |
 | authHeaders | Additional HTTP request headers for authentication.<br/> For example, to use API key authentication, you can select authentication type as “Anonymous” and specify API key in the header. | No |
 | connectVia | The [Integration Runtime](concepts-integration-runtime.md) to use to connect to the data store. Learn more from [Prerequisites](#prerequisites) section. If not specified, this property uses the default Azure Integration Runtime. |No |