Small changes after Mansi's review

Author: Gus Carreon

pbsmetrics/config/metrics.go

@@ -83,7 +83,7 @@ func (me *MultiMetricsEngine) RecordConnectionClose(success bool) {
 	}
 }
 
-// RecordImps across openRTB2 engines that support the 'Native' Imp type
+//RecordsImps records imps with imp types across all metric engines
 func (me *MultiMetricsEngine) RecordImps(implabels pbsmetrics.ImpLabels) {
 	for _, thisME := range *me {
 		thisME.RecordImps(implabels)

pbsmetrics/prometheus/prometheus.go

@@ -486,15 +486,6 @@ func requestTypesAsString() []string {
 	return output
 }
 
-func impTypesAsString() []string {
-	list := pbsmetrics.ImpTypes()
-	output := make([]string, len(list))
-	for i, s := range list {
-		output[i] = string(s)
-	}
-	return output
-}
-
 func browserTypesAsString() []string {
 	list := pbsmetrics.BrowserTypes()
 	output := make([]string, len(list))