drivers core: remove assert_held_device_hotplug()

The last caller of assert_held_device_hotplug() is gone, so remove it again.

Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Heiko Carstens <[e-mail]>
Acked-by: Dan Williams <[e-mail]>
Cc: Michal Hocko <[e-mail]>
Cc: "Rafael J. Wysocki" <[e-mail]>
Cc: Vladimir Davydov <[e-mail]>
Cc: Ben Hutchings <[e-mail]>
Cc: Gerald Schaefer <[e-mail]>
Cc: Martin Schwidefsky <[e-mail]>
Cc: Sebastian Ott <[e-mail]>
Cc: Greg Kroah-Hartman <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/base/core.c

···
 	return restart_syscall();
 }
 
-void assert_held_device_hotplug(void)
-{
-	lockdep_assert_held(&device_hotplug_lock);
-}
-
 #ifdef CONFIG_BLOCK
 static inline int device_is_not_partition(struct device *dev)
 {

include/linux/device.h

···
 extern void lock_device_hotplug(void);
 extern void unlock_device_hotplug(void);
 extern int lock_device_hotplug_sysfs(void);
-void assert_held_device_hotplug(void);
 extern int device_offline(struct device *dev);
 extern int device_online(struct device *dev);
 extern void set_primary_fwnode(struct device *dev, struct fwnode_handle *fwnode);