kernelci.legacy: remove old kci docker implementation

Remove the old `kci docker` implementation based on argparse as
there's now the new one based on Click and the kernelci.docker module.

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

Author: gctucker

kernelci/legacy/cli/__init__.py

@@ -12,7 +12,6 @@
 from . import (
     api,
     config,
-    docker,
     job,
     node,
     pubsub,
@@ -25,7 +24,6 @@
 _COMMANDS = {
     'api': api.main,
     'config': config.main,
-    'docker': docker.main,
     'job': job.main,
     'node': node.main,
     'pubsub': pubsub.main,