fix: function batch_no should only be declared once (#35115)

fix: function `batch_no` should only be declared once (#35115)

fix: remove twice event call of `batch_no` to update batch qty
(cherry picked from commit 19cd687)

Co-authored-by: Daizy Modi <modidaizy5217@gmail.com>

erpnext/selling/sales_common.js

@@ -299,7 +299,8 @@ erpnext.selling.SellingController = class SellingController extends erpnext.Tran
 	}
 
 	batch_no(doc, cdt, cdn) {
-		var me = this;
+		super.batch_no(doc, cdt, cdn);
+
 		var item = frappe.get_doc(cdt, cdn);
 
 		if (item.serial_no) {
@@ -378,10 +379,6 @@ erpnext.selling.SellingController = class SellingController extends erpnext.Tran
 			}
 	}
 
-	batch_no(doc, cdt, cdn) {
-		super.batch_no(doc, cdt, cdn);
-	}
-
 	qty(doc, cdt, cdn) {
 		super.qty(doc, cdt, cdn);