All images in the default registry (AKA docker.io, index.docker.io, and registry-1.docker.io) are available via the v2 protocol, so there's no reason to use the v1 protocol. Disabling it prevents useless fallbacks. Signed-off-by: Noah Treuhaft <noah.treuhaft@docker.com> Upstream-commit: 7ffb4ad81ab8e4400b0a588552ffb99dc55d13aa Component: engine