Support for API versions < v1.44 was removed in the client in [moby@96b29f5]
and [moby@7652f38], so we can remove fallback-code from the CLI as well,
as it won't be able to use those versions.
[moby@96b29f5]: 96b29f5a1f
[moby@7652f38]: 7652f38c28
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>