fix: upload attendance (#21620)

diff --git a/erpnext/hr/doctype/upload_attendance/upload_attendance.py b/erpnext/hr/doctype/upload_attendance/upload_attendance.py
index f75bb41..61faea1 100644
--- a/erpnext/hr/doctype/upload_attendance/upload_attendance.py
+++ b/erpnext/hr/doctype/upload_attendance/upload_attendance.py
@@ -145,7 +145,7 @@
 
 	def remove_holidays(rows):
 		rows = [ row for row in rows if row[4] != "Holiday"]
-		return
+		return rows
 
 	from frappe.modules import scrub