Typo

Author: PatAltimore

articles/iot-operations/manage-mqtt-broker/howto-configure-authentication.md

@@ -672,10 +672,6 @@ The custom authentication server must present a server certificate, and MQTT bro
 
 ### Enable custom authentication for a listener
 
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-# [Portal](#tab/portal)
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 Modify the `authenticationMethods` setting in a *BrokerAuthentication* resource to specify `Custom` as a valid authentication method. Then, specify the parameters required to communicate with a custom authentication server.
 
 This example shows all possible parameters. The exact parameters required depend on each custom server's requirements.