Removes redundant monitoring pages (#602)

Author: lcawl

docs/en/stack/index.asciidoc

@@ -22,8 +22,6 @@ include::introduction.asciidoc[]
 
 include::security/index.asciidoc[]
 
-include::monitoring/index.asciidoc[]
-
 include::ml/index.asciidoc[]
 
 include::{es-repo-dir}/ccr/index.asciidoc[]

docs/en/stack/monitoring/how-monitoring-works.asciidoc

@@ -283,3 +283,37 @@ See {ref}/watcher-troubleshooting.html[Troubleshooting Watcher].
 
 This page has moved. 
 See {ref}/watcher-limitations.html[Watcher limitations].
+
+[role="exclude",id="monitoring-production"]
+=== Monitoring in a production environment
+
+This page has moved.
+See {ref}/monitoring-production.html[Monitoring in a production environment].
+
+[role="exclude",id="how-monitoring-works"]
+=== How monitoring works
+
+This page has moved. 
+See {ref}/how-monitoring-works.html[How monitoring works].
+
+[role="exclude",id="monitoring-troubleshooting"]
+=== Troubleshooting monitoring
+
+This page has moved.
+See {ref}/monitoring-troubleshooting.html[Troubleshooting monitoring].
+
+[role="exclude",id="xpack-monitoring"]
+=== Monitoring the {stack}
+
+This page has moved. See:
+
+* {ref}/monitor-elasticsearch-cluster.html[Monitor a cluster]
+* {kibana-ref}/xpack-monitoring.html[Monitoring {kib}]
+* {logstash-ref}/monitoring-logstash.html[Monitoring Logstash]
+* Monitoring Beats:
+** {auditbeat-ref}/monitoring.html[Auditbeat]
+** {filebeat-ref}/monitoring.html[Filebeat]
+** {heartbeat-ref}/monitoring.html[Heartbeat]
+** {metricbeat-ref}/monitoring.html[Metricbeat]
+** {packetbeat-ref}/monitoring.html[Packetbeat]
+** {winlogbeat-ref}/monitoring.html[Winlogbeat]