Removed unused metric.

Author: karok2m

articles/iot-operations/reference/observability-metrics-opcua-broker.md

@@ -57,7 +57,6 @@ Emitted by all components: Supervisor, OPC UA Connector, and OPC UA Commander.
 > [!div class="mx-tdBreakAll"]
 > | Metric name                                         | Type            | Definition                                                                                                                                                                                    |
 > | --------------------------------------------------- | --------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-> | aio.opc.session.browse.invocation.count             | Counter         | The number of times browse was invoked for sessions.                                                                                                                                          |
 > | aio.opc.subscription.transfer.count                 | Counter         | The number of times a subscription was transferred.                                                                                                                                           |
 > | aio.opc.asset.telemetry.data_change.count           | Counter         | The number of asset data changes that were received.                                                                                                                                          |
 > | aio.opc.asset.telemetry.event.count                 | Counter         | The number of asset events that were received.                                                                                                                                                |