Change readme with remarks from @andyxning, remove duplicate comment

Author: jsenon

README.md

@@ -92,7 +92,6 @@ to another registry.
 
 ## Start DaemonSet
 * Edit [node-problem-detector.yaml](https://github.com/kubernetes/node-problem-detector/blob/master/deployment/node-problem-detector.yaml) to fit your environment: Set `log` volume to your system log directory. (Used by SystemLogMonitor). For **kubernetes <=1.9** use [node-problem-detector-old.yaml](https://github.com/kubernetes/node-problem-detector/blob/master/deployment/node-problem-detector-old.yaml)
-* Edit node-problem-detector.yaml to fit your environment: Set `log` volume to your system log directory. (Used by SystemLogMonitor)
 * Create the DaemonSet with `kubectl create -f node-problem-detector.yaml`
 * If needed, you can use [ConfigMap](https://kubernetes.io/docs/tasks/configure-pod-container/configure-pod-configmap/)
 to overwrite the `config/`.