rtc: vt8500: remove superfluous error message

The RTC core now has error messages in case of registration failure, there
is no need to have other messages in the drivers.

Link: https://lore.kernel.org/r/20191016201626.31309-3-alexandre.belloni@bootlin.comSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/rtc-vt8500.c

@@ -224,11 +224,8 @@ static int vt8500_rtc_probe(struct platform_device *pdev)
 
 	vt8500_rtc->rtc = devm_rtc_device_register(&pdev->dev, "vt8500-rtc",
 					      &vt8500_rtc_ops, THIS_MODULE);
-	if (IS_ERR(vt8500_rtc->rtc)) {
-		dev_err(&pdev->dev,
-			"Failed to register RTC device -> %d\n", ret);
+	if (IS_ERR(vt8500_rtc->rtc))
 		return PTR_ERR(vt8500_rtc->rtc);
-	}
 
 	ret = devm_request_irq(&pdev->dev, vt8500_rtc->irq_alarm,
 				vt8500_rtc_irq, 0, "rtc alarm", vt8500_rtc);