Remove notify_on_any_change option

This option isn't really needed, since the case it defends is already
covered by notify_on_state_change. Let's simplify the configuration a
bit by removing it.

DocImpact

Change-Id: I35071abdea2d2380d79c07e9134e095bda65a13d
Signed-off-by: Julien Danjou <julien@danjou.info>
Merge "Remove notify_on_any_change option"