Removes link to enable monitoring in single namespace (quay#1213)

Co-authored-by: Steven Smith <[email protected]>

Author: stevsmit

modules/operator-unmanaged-monitoring.adoc

@@ -18,4 +18,7 @@ spec:
       managed: false
 ----
 
-To enable monitoring in this scenario, see link:https://access.redhat.com/documentation/en-us/red_hat_quay/3/html-single/deploy_red_hat_quay_on_openshift_with_the_quay_operator/index#monitoring-single-namespace[Enabling monitoring when the {productname} Operator is installed in a single namespace].
+[NOTE]
+====
+Monitoring cannot be enabled when the {productname} Operator is installed in a single namespace.
+====