docs: driver-model: remove a duplicated markup at driver.rst

The "::" markup is there twice, causing a warning:

Documentation/driver-api/driver-model/driver.rst:233: WARNING: Inline emphasis start-string without end-string.

Signed-off-by: Mauro Carvalho Chehab <[e-mail]>
Link: https://lore.kernel.org/r/52c65b[e-mail]
Signed-off-by: Jonathan Corbet <[e-mail]>

Documentation/driver-api/driver-model/driver.rst

···
 not restricted to that. Use it whenever it makes sense to take an action after
 all the consumers of a device have probed::
 
-::
-
 	int 	(*remove)	(struct device *dev);
 
 remove is called to unbind a driver from a device. This may be