sanity: Drop data finalize call

This call was effectively like update_data and no longer did anything
in bitbake. Drop it as it is obsolete.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
(cherry picked from commit d3eb4531)
Signed-off-by: Steve Sakoman <steve@sakoman.com>