thermal/of: Remove of_thermal_get_crit_temp()

The generic version of of_thermal_get_crit_temp() can be used. Let's
remove this ops which is pointless.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20221003092602.1323944-20-daniel.lezcano@linaro.org

drivers/thermal/thermal_of.c

@@ -19,20 +19,6 @@
 
 #include "thermal_core.h"
 
-static int of_thermal_get_crit_temp(struct thermal_zone_device *tz,
-				    int *temp)
-{
-	int i;
-
-	for (i = 0; i < tz->num_trips; i++)
-		if (tz->trips[i].type == THERMAL_TRIP_CRITICAL) {
-			*temp = tz->trips[i].temperature;
-			return 0;
-		}
-
-	return -EINVAL;
-}
-
 /***   functions parsing device tree nodes   ***/
 
 static int of_find_trip_id(struct device_node *np, struct device_node *trip)
@@ -531,7 +517,6 @@ struct thermal_zone_device *thermal_of_zone_register(struct device_node *sensor,
 		goto out_kfree_trips;
 	}
 
-	of_ops->get_crit_temp = of_ops->get_crit_temp ? : of_thermal_get_crit_temp;
 	of_ops->bind = thermal_of_bind;
 	of_ops->unbind = thermal_of_unbind;