thermal/drivers/mediatek/lvts_thermal: Remove redundant msg in lvts_ctrl_start()

The upper-layer devm_thermal_add_hwmon_sysfs() function can directly
print error information.
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230620090732.50025-10-frank.li@vivo.com

drivers/thermal/mediatek/lvts_thermal.c

@@ -998,8 +998,7 @@ static int lvts_ctrl_start(struct device *dev, struct lvts_ctrl *lvts_ctrl)
 			return PTR_ERR(tz);
 		}
 
-		if (devm_thermal_add_hwmon_sysfs(dev, tz))
-			dev_warn(dev, "zone %d: Failed to add hwmon sysfs attributes\n", dt_id);
+		devm_thermal_add_hwmon_sysfs(dev, tz);
 
 		/*
 		 * The thermal zone pointer will be needed in the