driver core: Drop mention of obsolete bus rwsem from kernel-doc

15 years ago, commit 6eded061 ("Fix up bus code and remove use of
rwsem") removed the bus rwsem, but left over a reference to it in a
kernel-doc comment.  Drop it.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Link: https://lore.kernel.org/r/b1af31b0e351bcbc056fe1ec44500737a7998d43.1594210157.git.lukas@wunner.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/dd.c

@@ -430,10 +430,9 @@ static void driver_sysfs_remove(struct device *dev)
  * Allow manual attachment of a driver to a device.
  * Caller must have already set @dev->driver.
  *
- * Note that this does not modify the bus reference count
- * nor take the bus's rwsem. Please verify those are accounted
- * for before calling this. (It is ok to call with no other effort
- * from a driver's probe() method.)
+ * Note that this does not modify the bus reference count.
+ * Please verify that is accounted for before calling this.
+ * (It is ok to call with no other effort from a driver's probe() method.)
  *
  * This function must be called with the device lock held.
  */