[draft][19.03 backport] Remove "docker engine" subcommands#2829

thaJeztah wants to merge 2 commits intodocker:19.03docker/cli:19.03from

thaJeztah:19.03_backport_remove_engine_activatethaJeztah/cli:19.03_backport_remove_engine_activateCopy head branch name to clipboard