Remove ETCD monitor
Remove ETCD monitor

We removed this component, but not the monitor for it. It was configured
to not alert when no data was being received, so we didn't notice it.

alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf