This commit removes Notary and Content Trust.
Notary v1 is due to be replaced with Notary v2 soon.
There is no clean migration path from one to the other.
For now, this removes all signing from LinuxKit.
We will look to add this back once a new Notary alternative
becomes available.
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
Not sure when this arrived but it was stopping anything running.
Appears not to be in the older test `init` containers.
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
