This field was used when the code supported both "v1" and "v2" registries.
We no longer support v1 registries, and the only v1 endpoint that's still
used is for the legacy "search" endpoint, which does not use the APIEndpoint
type.
As no code is using this field, and the value will always be set to "v2",
we can deprecated the Version field.
I'm keeping this field for 1 release, to give notice to any potential
external consumer, after which we can delete it.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
d43e61758a