refactor(stock): remove dead get_serialized_items method

get_serialized_items had zero callers anywhere (Python, JS, run_method) on develop
and after the refactor; it was relocated into SerialBatchBundleService by mistake
instead of being dropped. Delete it — also removes a raw frappe.db.sql_list query
that duplicated the ORM helper get_serial_or_batch_items.

erpnext/stock/services/serial_batch_bundle.py

@@ -678,15 +678,3 @@ class SerialBatchBundleService:
 			)
 			.where((doctype.docstatus == 1) & (child_doc.batch_no.isin(batches)))
 		).run(as_dict=True)
-
-	def get_serialized_items(self):
-		serialized_items = []
-		item_codes = list(set(d.item_code for d in self.doc.get("items")))
-		if item_codes:
-			serialized_items = frappe.db.sql_list(
-				"""select name from `tabItem`
-				where has_serial_no=1 and name in ({})""".format(", ".join(["%s"] * len(item_codes))),
-				tuple(item_codes),
-			)
-
-		return serialized_items