removed npm install appmetrics from node-red-test

Author: janvda

node-red-test/Dockerfile

@@ -8,6 +8,5 @@ USER node-red
 RUN npm install node-red-contrib-resinio
 RUN npm install node-red-dashboard
 RUN npm install node-red-contrib-credentials
-RUN npm install appmetrics
 
 COPY ./settings.js /data/settings.js