delete branch on merge
diff --git a/.asf.yaml b/.asf.yaml
index bb30f8f..be7e0e4 100644
--- a/.asf.yaml
+++ b/.asf.yaml
@@ -15,5 +15,5 @@
         require_code_owner_reviews: true
         required_approving_review_count: 3
       required_linear_history: true
- 
       required_signatures: true
+  del_branch_on_merge: true