Deploying stacks using the "Docker Application Bundle" (`.dab`) file
format was introduced as an experimental feature in Docker 1.13 /
17.03, but superseded by support for Docker Compose files in the CLI.
With no development being done on this feature, and no active use of the file
format, support for the DAB file format and the top-level `docker deploy` command
(hidden by default in 19.03), will be removed from the CLI, in favour of
`docker stack deploy` using compose files.
This patch removes documentation for the `docker-compose bundle` subcommand,
which was used to convert compose files into DAB files (and given the above,
will no longer be needed).
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
