This package doesn't really seem to do anything of real interest.
Removing it and replacing with a few helper functions. Most of this was
maintaining a fork of ctxhttp to support a mock that was unnecessary.
We could probably do with a further refactor of the client interface.
There is a lot of confusion of between transport, http layer and
application layer that makes for some awkward code. This change
improves the situation to the point where no breaking changes are
introduced.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
Instead of reformatting error from the request action, we wrap it,
allowing the cause to be recovered. This is important for consumers that
need to be able to detect context errors, such as `Cancelled` and
`DeadlineExceeded`.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
