cmd/tailscaled: clean up unnecessary logf indirection #cleanup

Signed-off-by: David Anderson <dave@tailscale.com>

cmd/tailscaled/tailscaled.go

@@ -391,9 +391,7 @@ func run() (err error) {
 	var netMon *netmon.Monitor
 	isWinSvc := isWindowsService()
 	if !isWinSvc {
-		netMon, err = netmon.New(func(format string, args ...any) {
-			logf(format, args...)
-		})
+		netMon, err = netmon.New(logf)
 		if err != nil {
 			return fmt.Errorf("netmon.New: %w", err)
 		}