Revert "feat: backup revolution"

This reverts commit c5687dfbd7.

This is a temporary measure to facilitate a release which won't
completely explode peoples workflows (missing command logic). We
re-instate this commit after the first 0.9.x release.

pkg/container/container.go

@@ -28,7 +28,7 @@ func GetContainer(c context.Context, cl *client.Client, filters filters.Args, no
 		return types.Container{}, fmt.Errorf("no containers matching the %v filter found?", filter)
 	}
 
-	if len(containers) > 1 {
+	if len(containers) != 1 {
 		var containersRaw []string
 		for _, container := range containers {
 			containerName := strings.Join(container.Names, " ")