Drop (Preview) from docs on Azure Monitor integration

Author: micahl

articles/iot-edge/how-to-add-custom-metrics.md

@@ -11,7 +11,7 @@ ms.service: iot-edge
 services: iot-edge
 ---
 
-# Add custom metrics (Preview)
+# Add custom metrics
 
 [!INCLUDE [iot-edge-version-all-supported](../../includes/iot-edge-version-all-supported.md)]
 

articles/iot-edge/how-to-collect-and-transport-metrics.md

@@ -11,7 +11,7 @@ ms.service: iot-edge
 services: iot-edge
 ---
 
-# Collect and transport metrics (Preview)
+# Collect and transport metrics
 
 [!INCLUDE [iot-edge-version-all-supported](../../includes/iot-edge-version-all-supported.md)]
 

articles/iot-edge/how-to-create-alerts.md

@@ -11,7 +11,7 @@ ms.service: iot-edge
 services: iot-edge
 ---
 
-# Get notified about issues using alerts (Preview)
+# Get notified about issues using alerts
 
 [!INCLUDE [iot-edge-version-all-supported](../../includes/iot-edge-version-all-supported.md)]
 
@@ -64,4 +64,4 @@ Click the alert rule name to see more context about the alert. Clicking the devi
 
 ## Next steps
 
-Enhance your monitoring solution with [metrics from custom modules](how-to-add-custom-metrics.md).
+Enhance your monitoring solution with [metrics from custom modules](how-to-add-custom-metrics.md).

articles/iot-edge/how-to-explore-curated-visualizations.md

@@ -11,7 +11,7 @@ ms.service: iot-edge
 services: iot-edge
 ---
 
-# Explore curated visualizations (Preview)
+# Explore curated visualizations
 
 [!INCLUDE [iot-edge-version-all-supported](../../includes/iot-edge-version-all-supported.md)]
 
@@ -161,4 +161,4 @@ For example, you may want to change the thresholds for when a device is consider
 
 ## Next steps
 
-Customize your monitoring solution with [alert rules](how-to-create-alerts.md) and [metrics from custom modules](how-to-add-custom-metrics.md).
+Customize your monitoring solution with [alert rules](how-to-create-alerts.md) and [metrics from custom modules](how-to-add-custom-metrics.md).