health: remove exporting_metrics_lost template

[ilyam8]

Summary

We have

netdata/health/health.d/exporting.conf

Lines 14 to 23 in 32344ec

	template: exporting_metrics_sent
	families: *
	on: exporting_data_size
	units: %
	calc: abs($sent) * 100 / abs($buffered)
	every: 10s
	warn: $this != 100
	delay: down 5m multiplier 1.5 max 1h
	info: percentage of metrics sent to the external database server
	to: dba

if sent % != 100 => there is some metrics lost. No need in having both of these alarms.

Component Name

health

Test Plan

Additional Information