instance_backing is no longer being used during configuration
and so the dead code is being removed.
This has a cascade effect. Other methods and validators no longer
are required.
This update methods have been retained, even though there is nothing
for them to update.
Change-Id: I76b0181a2a3dd7d7d6c8d8b686dd724ab269844d
Story: 2004764
Task: 30119
Signed-off-by: Al Bailey <Al.Bailey@windriver.com>
f22c942ce0