fix: undefined variable  due to inconsistent porting of commits (#26994)

diff --git a/erpnext/payroll/doctype/salary_slip/salary_slip.py b/erpnext/payroll/doctype/salary_slip/salary_slip.py
index bd982cf..5f5fdd5 100644
--- a/erpnext/payroll/doctype/salary_slip/salary_slip.py
+++ b/erpnext/payroll/doctype/salary_slip/salary_slip.py
@@ -680,7 +680,6 @@
 				component_row.set(attr, component_data.get(attr))
 
 		if additional_salary:
-			component_row.is_recurring_additional_salary = is_recurring
 			if additional_salary.overwrite:
 				component_row.additional_amount = flt(flt(amount) - flt(component_row.get("default_amount", 0)),
 					component_row.precision("additional_amount"))