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.

cli/app/run.go

@@ -91,7 +91,7 @@ var appRunCommand = cli.Command{
 			logrus.Fatal(err)
 		}
 
-		if _, err := container.RunExec(dcli, cl, targetContainer.ID, &execCreateOpts); err != nil {
+		if err := container.RunExec(dcli, cl, targetContainer.ID, &execCreateOpts); err != nil {
 			logrus.Fatal(err)
 		}