cmd/rvcl/main.go: don't need to use multiWriter anymore in logger.New call

cmd/rvcl/main.go

@@ -61,7 +61,6 @@ import (
 	"encoding/json"
 	"flag"
 	"fmt"
-	"io"
 	"os"
 	"runtime/pprof"
 
@@ -150,14 +149,12 @@ func main() {
 	// writing of messages.
 	log = logger.New(
 		logLevel,
-		io.MultiWriter(
-			&lumberjack.Logger{
-				Filename:   logPath,
-				MaxSize:    logMaxSize, // MB
-				MaxBackups: logMaxBackups,
-				MaxAge:     logMaxAge, // days
-			},
-		),
+		&lumberjack.Logger{
+			Filename:   logPath,
+			MaxSize:    logMaxSize, // MB
+			MaxBackups: logMaxBackups,
+			MaxAge:     logMaxAge, // days
+		},
 		logSuppress,
 	)