refactor: getattr

Co-authored-by: gavin <gavin18d@gmail.com>

frappe/modules/import_file.py

@@ -107,7 +107,7 @@ def import_doc(docdict, force=False, data_import=False, pre_process=None,
 
 	doc = frappe.get_doc(docdict)
 
-	if hasattr(doc.meta, 'is_tree') and getattr(doc.meta, 'is_tree'):
+	if getattr(doc.meta, 'is_tree', None):
 		doc.lft = None
 		doc.rgt = None