The skip_policy_check flag is used to skip the legacy v2 API
policy check points in the v2.1 API. The legacy v2 API is removed
and all the old policy check points removed also. This flag is
useless anymore, this patch cleanup them.
Partially implements blueprint remove-legacy-v2-api-code
Change-Id: Ia4a8d9954bf456253101b936f8b4ff513aaa73b2