Revert "start: close data socket in parent"

src/lxc/start.c

@@ -1149,11 +1149,6 @@ int __lxc_start(const char *name, struct lxc_conf *conf,
 		ERROR("failed to spawn '%s'", name);
 		goto out_fini_nonet;
 	}
-	/* close parent side of data socket */
-	close(handler->data_sock[0]);
-	handler->data_sock[0] = -1;
-	close(handler->data_sock[1]);
-	handler->data_sock[1] = -1;
 
 	handler->conf->reboot = 0;