pkg/report: make use of builtin min/max function

This patch eliminates the minDuration and maxDuration functions,
simplifies the code.

Signed-off-by: Jes Cok <[email protected]>

pkg/report/timeseries.go

@@ -64,9 +64,9 @@ func (sp *secondPoints) Add(ts time.Time, lat time.Duration) {
 		sp.tm[tk] = secondPoint{minLatency: lat, maxLatency: lat, totalLatency: lat, count: 1}
 	} else {
 		if lat != time.Duration(0) {
-			v.minLatency = minDuration(v.minLatency, lat)
+			v.minLatency = min(v.minLatency, lat)
 		}
-		v.maxLatency = maxDuration(v.maxLatency, lat)
+		v.maxLatency = max(v.maxLatency, lat)
 		v.totalLatency += lat
 		v.count++
 		sp.tm[tk] = v
@@ -144,17 +144,3 @@ func (t TimeSeries) String() string {
 	}
 	return fmt.Sprintf("\nSample in one second (unix latency throughput):\n%s", buf.String())
 }
-
-func minDuration(a, b time.Duration) time.Duration {
-	if a < b {
-		return a
-	}
-	return b
-}
-
-func maxDuration(a, b time.Duration) time.Duration {
-	if a > b {
-		return a
-	}
-	return b
-}