rtc: rs5c372: remove useless message

It is not necessary to print a message when the time is invalid as
userspace will already get an error (and an optional dev_dbg message).
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/rtc-rs5c372.c

@@ -581,7 +581,6 @@ static int rs5c372_probe(struct i2c_client *client,
 	int err = 0;
 	int smbus_mode = 0;
 	struct rs5c372 *rs5c372;
-	struct rtc_time tm;
 
 	dev_dbg(&client->dev, "%s\n", __func__);
 
@@ -662,9 +661,6 @@ static int rs5c372_probe(struct i2c_client *client,
 		goto exit;
 	}
 
-	if (rs5c372_get_datetime(client, &tm) < 0)
-		dev_warn(&client->dev, "clock needs to be set\n");
-
 	dev_info(&client->dev, "%s found, %s\n",
 			({ char *s; switch (rs5c372->type) {
 			case rtc_r2025sd:	s = "r2025sd"; break;