[IMP] stock_picking_batch: remove ensure_one in action_cancel

This commit removes a needless `ensure_one` in batch `action_cancel`

Part-of: odoo/odoo#97401

addons/stock_picking_batch/models/stock_picking_batch.py

@@ -191,7 +191,6 @@ class StockPickingBatch(models.Model):
         return True
 
     def action_cancel(self):
-        self.ensure_one()
         self.state = 'cancel'
         self.picking_ids = False
         return True