Remove custom metrics entry from OKD What's New

Author: mburke5678

whats_new/new-features.adoc

@@ -156,7 +156,7 @@ in the cluster, one per node.
 
 [id="ocp-cluster-monitoring"]
 == Cluster monitoring
-
+////
 [id="ocp-autoscale-pods-horizontally-based-on-custom-metrics-api"]
 === Autoscale pods horizontally based on the custom metrics API (Technology Preview)
 
@@ -174,6 +174,7 @@ load-balanced replicas, using Kubernetes services).
 * The `APIService` configuration to wire Kubernetes' API aggregation to the
 instance of the custom metrics adapter will be overwritten in future releases,
 if {product-title} ships an out-of-the-box custom metrics adapter.
+////
 
 [id="ocp-cluster-monitoring-alerting-UI"]
 === New alerting user interface