thermal: core: Remove pointless debug traces

The last temperature and the current temperature are show via a
dev_debug. The line before, those temperature are also traced.

It is pointless to duplicate the traces for the temperatures,
remove the dev_dbg traces.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>
Link: https://lore.kernel.org/r/20200331165449.30355-2-daniel.lezcano@linaro.org

drivers/thermal/thermal_core.c

@@ -447,12 +447,6 @@ static void update_temperature(struct thermal_zone_device *tz)
 	mutex_unlock(&tz->lock);
 
 	trace_thermal_temperature(tz);
-	if (tz->last_temperature == THERMAL_TEMP_INVALID)
-		dev_dbg(&tz->device, "last_temperature N/A, current_temperature=%d\n",
-			tz->temperature);
-	else
-		dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n",
-			tz->last_temperature, tz->temperature);
 }
 
 static void thermal_zone_device_init(struct thermal_zone_device *tz)