Deduplicate monitoring section in documentation

Monitoring section was present more than once in the README.
Remove redundant titles and deduplicate under one unique one.

Change-Id: I7c90e0a060ec9257fe0db5f6dbadbed9c20766ee
diff --git a/master-slave/README.md b/master-slave/README.md
index 644b7ff..0363deb 100644
--- a/master-slave/README.md
+++ b/master-slave/README.md
@@ -52,6 +52,7 @@
 
 * Standard CloudWatch monitoring metrics for each component
 * Application level CloudWatch monitoring can be enabled as described [here](../Configuration.md#cloudwatch-monitoring)
+* Optionally Prometheus and Grafana stack (see [here](../monitoring/README.md))
 
 ## How to run it
 
@@ -142,16 +143,6 @@
 * HTTP `9080`
 * SSH `39418`
 
-### Monitoring
-
-* Standard CloudWatch monitoring metrics for each component
-* Optionally Prometheus and Grafana stack (see [here](../monitoring/README.md))
-
-## Monitoring
-
-If you want to monitor your system, you can add a Prometheus and Grafana stack.
-[Here](../monitoring/README.md) you can find the details on how to add it.
-
 ### Docker
 
 Refer to the [Docker](../Docker.md) section for information on how to setup docker or how to publish images