Migrate rm command to cobra

Signed-off-by: Zhang Wei <zhangwei555@huawei.com>

cobraadaptor/adaptor.go

@@ -44,6 +44,7 @@ func NewCobraAdaptor(clientFlags *cliflags.ClientFlags) CobraAdaptor {
 		container.NewPortCommand(dockerCli),
 		container.NewRenameCommand(dockerCli),
 		container.NewRestartCommand(dockerCli),
+		container.NewRmCommand(dockerCli),
 		container.NewRunCommand(dockerCli),
 		container.NewStartCommand(dockerCli),
 		container.NewStopCommand(dockerCli),

usage.go

@@ -22,7 +22,6 @@ var DockerCommandUsage = []Command{
 	{"ps", "List containers"},
 	{"pull", "Pull an image or a repository from a registry"},
 	{"push", "Push an image or a repository to a registry"},
-	{"rm", "Remove one or more containers"},
 	{"save", "Save one or more images to a tar archive"},
 	{"stats", "Display a live stream of container(s) resource usage statistics"},
 	{"tag", "Tag an image into a repository"},