driver core: remove the driver-model structures from the documentation

Remove the struct bus_type, class, device, device_driver from the
driver-model docs. With another patch add them to device.h, since
they are out of date. That will keep things up to date and provide
a better way to document this stuff.

Signed-off-by: Wanlong Gao <wanlong.gao@gmail.com>
Acked-by: Harry Wei <harryxiyou@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Documentation/driver-model/class.txt

@@ -27,22 +27,7 @@ The device class structure looks like:
 typedef int (*devclass_add)(struct device *);
 typedef void (*devclass_remove)(struct device *);
 
-struct device_class {
-	char			* name;
-	rwlock_t		lock;
-	u32			devnum;
-	struct list_head	node;
-
-	struct list_head	drivers;
-	struct list_head	intf_list;
-
-	struct driver_dir_entry	dir;
-	struct driver_dir_entry	device_dir;
-	struct driver_dir_entry	driver_dir;
-
-	devclass_add		add_device;
-	devclass_remove		remove_device;
-};
+See the kerneldoc for the struct class.
 
 A typical device class definition would look like: