driver core: remove devm_device_remove_group()

There is no in-kernel user of this function, so it is not needed anymore
and can be removed.

Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Rafael J. Wysocki <rafael@kernel.org>
Link: https://lore.kernel.org/r/20221109140711.105222-2-gregkh@linuxfoundation.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/core.c

@@ -2585,11 +2585,6 @@ union device_attr_group_devres {
 	const struct attribute_group **groups;
 };
 
-static int devm_attr_group_match(struct device *dev, void *res, void *data)
-{
-	return ((union device_attr_group_devres *)res)->group == data;
-}
-
 static void devm_attr_group_remove(struct device *dev, void *res)
 {
 	union device_attr_group_devres *devres = res;
@@ -2640,23 +2635,6 @@ int devm_device_add_group(struct device *dev, const struct attribute_group *grp)
 }
 EXPORT_SYMBOL_GPL(devm_device_add_group);
 
-/**
- * devm_device_remove_group: remove a managed group from a device
- * @dev:	device to remove the group from
- * @grp:	group to remove
- *
- * This function removes a group of attributes from a device. The attributes
- * previously have to have been created for this group, otherwise it will fail.
- */
-void devm_device_remove_group(struct device *dev,
-			      const struct attribute_group *grp)
-{
-	WARN_ON(devres_release(dev, devm_attr_group_remove,
-			       devm_attr_group_match,
-			       /* cast away const */ (void *)grp));
-}
-EXPORT_SYMBOL_GPL(devm_device_remove_group);
-
 /**
  * devm_device_add_groups - create a bunch of managed attribute groups
  * @dev:	The device to create the group for

include/linux/device.h

@@ -1064,8 +1064,6 @@ int __must_check devm_device_add_groups(struct device *dev,
 					const struct attribute_group **groups);
 int __must_check devm_device_add_group(struct device *dev,
 				       const struct attribute_group *grp);
-void devm_device_remove_group(struct device *dev,
-			      const struct attribute_group *grp);
 
 /*
  * Platform "fixup" functions - allow the platform to have their say