fix golint issues, else blocks (#457)

core/stat/internal/cgroup_linux.go

@@ -110,16 +110,16 @@ func parseUint(s string) (uint64, error) {
 	if err != nil {
 		if err.(*strconv.NumError).Err == strconv.ErrRange {
 			return 0, nil
-		} else {
-			return 0, fmt.Errorf("cgroup: bad int format: %s", s)
-		}
-	} else {
-		if v < 0 {
-			return 0, nil
-		} else {
-			return uint64(v), nil
 		}
+
+		return 0, fmt.Errorf("cgroup: bad int format: %s", s)
 	}
+
+	if v < 0 {
+		return 0, nil
+	}
+
+	return uint64(v), nil
 }
 
 func parseUints(val string) ([]uint64, error) {

core/stat/metrics.go

@@ -185,9 +185,9 @@ func getTopDuration(tasks []Task) float32 {
 	top := topK(tasks, 1)
 	if len(top) < 1 {
 		return 0
-	} else {
-		return float32(top[0].Duration) / float32(time.Millisecond)
 	}
+
+	return float32(top[0].Duration) / float32(time.Millisecond)
 }
 
 func log(report *StatReport) {