Merge pull request #113155 from logicalhan/proxy-metric

migrate usage of `merge` to `MergeBuckets` for static analysis

pkg/proxy/metrics/metrics.go

@@ -61,7 +61,7 @@ var (
 			Subsystem: kubeProxySubsystem,
 			Name:      "network_programming_duration_seconds",
 			Help:      "In Cluster Network Programming Latency in seconds",
-			Buckets: merge(
+			Buckets: metrics.MergeBuckets(
 				metrics.LinearBuckets(0.25, 0.25, 2), // 0.25s, 0.50s
 				metrics.LinearBuckets(1, 1, 59),      // 1s, 2s, 3s, ... 59s
 				metrics.LinearBuckets(60, 5, 12),     // 60s, 65s, 70s, ... 115s
@@ -186,11 +186,3 @@ func RegisterMetrics() {
 func SinceInSeconds(start time.Time) float64 {
 	return time.Since(start).Seconds()
 }
-
-func merge(slices ...[]float64) []float64 {
-	result := make([]float64, 1)
-	for _, s := range slices {
-		result = append(result, s...)
-	}
-	return result
-}