regulator: core: remove some dead code

Originally queue_delayed_work() used to negative error codes or 0 and 1
on success depending if the work was queued or not. It caused a lot of
bugs where people treated all non-zero returns as failures so we changed
it to return bool instead in d4283e937861 ('workqueue: make queueing
functions return bool'). Now it never returns failure.

Checking for negative values causes a static checker warning since it is
impossible based on the bool type.

Signed-off-by: Dan Carpenter <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

drivers/regulator/core.c

···
 int regulator_disable_deferred(struct regulator *regulator, int ms)
 {
 	struct regulator_dev *rdev = regulator->rdev;
-	int ret;
 
 	if (regulator->always_on)
 		return 0;
···
 	rdev->deferred_disables++;
 	mutex_unlock(&rdev->mutex);
 
-	ret = queue_delayed_work(system_power_efficient_wq,
-				 &rdev->disable_work,
-				 msecs_to_jiffies(ms));
-	if (ret < 0)
-		return ret;
-	else
-		return 0;
+	queue_delayed_work(system_power_efficient_wq, &rdev->disable_work,
+			   msecs_to_jiffies(ms));
+	return 0;
 }
 EXPORT_SYMBOL_GPL(regulator_disable_deferred);