Update metrics-integrations.mdx

Author: dustin-temporal

docs/cloud/metrics/openmetrics/metrics-integrations.mdx

@@ -38,8 +38,7 @@ Datadog provides a serverless integration with the OpenMetrics endpoint. It scra
 
 1. In Datadog, open the [Integrations catalog](https://app.datadoghq.com/integrations) and search for **Temporal Cloud OpenMetrics**. Install the integration.
 2. Click **Add Account** in the integration tile and paste your Temporal Cloud API key into the **API Key** field.
-3. (Optional) In **Namespaces**, provide a comma-separated list of Namespaces to scrape. Leave empty to scrape every Namespace available to the API key.
-4. Save the configuration. The default Temporal Cloud dashboard appears in **Dashboards → Dashboards List** once data starts flowing (typically within a few minutes).
+3. Save the configuration. The default Temporal Cloud dashboard appears in **Dashboards → Dashboards List** once data starts flowing (typically within a few minutes).
 
 For Datadog-side details, see the [Datadog integration page](https://docs.datadoghq.com/integrations/temporal-cloud-openmetrics/).