These annotations were picked up by the YAML docs generator, and shows up as
"minimum API version". I couldn't find a reference to these annotations in the
PR that added them, so thought it would be ok to remove
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This allows all subcommands to use this flag.
Additionally reads the default value for the flag from the
`BUILDX_BUILDER` env var.
Precedence is:
CLI ARG > flag > env var > config file
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
