Revert "fix travis"

This reverts commit 10ca635.

Author: gsmolk

src/archive.c

@@ -1109,8 +1109,7 @@ do_archive_get(InstanceConfig *instance, const char *prefetch_dir_arg,
 			{
 				/* discard prefetch */
 //				n_fetched = 0;
-//				pgut_rmtree(prefetch_dir, false, false);
-				rmtree(prefetch_dir, false);
+				pgut_rmtree(prefetch_dir, false, false);
 			}
 		}
 		else

src/delete.c

@@ -985,7 +985,7 @@ do_delete_instance(void)
 	parray_free(backup_list);
 
 	/* Delete all wal files. */
-	rmtree(arclog_path, false);
+	pgut_rmtree(arclog_path, false, true);
 
 	/* Delete backup instance config file */
 	join_path_components(instance_config_path, backup_instance_path, BACKUP_CATALOG_CONF_FILE);