fix: remove the unused retry index field (#11903)

Signed-off-by: -LAN- <laipz8200@outlook.com>
Co-authored-by: Novice Lee <novicelee@NoviPro.local>
Co-authored-by: -LAN- <laipz8200@outlook.com>

api/models/workflow.py

@@ -641,7 +641,6 @@ class WorkflowNodeExecution(db.Model):
     created_by_role = db.Column(db.String(255), nullable=False)
     created_by = db.Column(StringUUID, nullable=False)
     finished_at = db.Column(db.DateTime)
-    retry_index = db.Column(db.Integer, server_default=db.text("0"))
 
     @property
     def created_by_account(self):