power: regulator: Drop regulator_unset()

This function is never called, drop it.

Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/drivers/power/regulator/regulator-uclass.c b/drivers/power/regulator/regulator-uclass.c
index 9fcc4bd..4e83819 100644
--- a/drivers/power/regulator/regulator-uclass.c
+++ b/drivers/power/regulator/regulator-uclass.c
@@ -345,17 +345,6 @@
 	return ret;
 }
 
-int regulator_unset(struct udevice *dev)
-{
-	struct dm_regulator_uclass_plat *uc_pdata;
-
-	uc_pdata = dev_get_uclass_plat(dev);
-	if (uc_pdata && uc_pdata->force_off)
-		return regulator_set_enable(dev, false);
-
-	return -EMEDIUMTYPE;
-}
-
 static void regulator_show(struct udevice *dev, int ret)
 {
 	struct dm_regulator_uclass_plat *uc_pdata;
diff --git a/include/power/regulator.h b/include/power/regulator.h
index bb07a81..5363483 100644
--- a/include/power/regulator.h
+++ b/include/power/regulator.h
@@ -430,7 +430,7 @@
  *
  * This disables all regulators which are marked to be off at boot time.
  *
- * This effectively calls regulator_unset() for every regulator.
+ * This effectively does nothing.
  */
 int regulators_enable_boot_off(bool verbose);
 
@@ -454,18 +454,6 @@
 int regulator_autoset(struct udevice *dev);
 
 /**
- * regulator_unset: turn off a regulator
- *
- * The setup depends on constraints found in device's uclass's platform data
- * (struct dm_regulator_uclass_platdata):
- *
- * - Disable - will set - if  'force_off' is set to true,
- *
- * The function returns on the first-encountered error.
- */
-int regulator_unset(struct udevice *dev);
-
-/**
  * regulator_autoset_by_name: setup the regulator given by its uclass's
  * platform data name field. The setup depends on constraints found in device's
  * uclass's platform data (struct dm_regulator_uclass_plat):