[epic] remove experimental "docker (stack) deploy" using "dab" files

[thaJeztah]

The top-level docker deploy command (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"Docker Application Bundle" (.dab) file format was introduced as an experimental feature in Docker 1.13 / 17.03, but superseded by support for Docker Compose files (and docker app / CNAB).

With no development being done on this feature, and no active use of the file format, we will be removing support for the DAB file format, and the top-level docker deploy command (hidden by default in 19.03 through #1602), in favour of docker stack deploy using compose files.

• remove top-level docker deploy command (Remove experimental "deploy" from "dab" files #2216)
• remove --bundle-file flags from commands (Remove experimental "deploy" from "dab" files #2216)
• remove the docker-compose bundle command (used to convert docker-compose files to .dab) (Remove "bundle" subcommand and support for DAB files compose#7085)
• update the documentation, and remove references to the .dab format and docker deploy subcommand (Remove "bundle" subcommand and support for DAB files docs#9987).
• updated deprecated features page (docs: updated "deprecated features" page #2319)

[AkihiroSuda]

Any remaining issue?

[thaJeztah]

No, I think we're all set: we updated the documentation already (even though it's not "removed" yet from the current release, but doesn't hurt to limit exposure of the feature).

Let me close this one 👍