fix(Payroll): no need to set `abbr` specially in Salary Slip (#25877)

diff --git a/erpnext/payroll/doctype/salary_slip/salary_slip.py b/erpnext/payroll/doctype/salary_slip/salary_slip.py
index afdf081..3c25331 100644
--- a/erpnext/payroll/doctype/salary_slip/salary_slip.py
+++ b/erpnext/payroll/doctype/salary_slip/salary_slip.py
@@ -621,16 +621,13 @@
 
 			component_row = self.append(component_type)
 			for attr in (
-				'depends_on_payment_days', 'salary_component',
+				'depends_on_payment_days', 'salary_component', 'abbr',
 				'do_not_include_in_total', 'is_tax_applicable',
 				'is_flexible_benefit', 'variable_based_on_taxable_salary',
 				'exempted_from_income_tax'
 			):
 				component_row.set(attr, component_data.get(attr))
 
-			abbr = component_data.get('abbr') or component_data.get('salary_component_abbr')
-			component_row.set('abbr', abbr)
-
 		if additional_salary:
 			component_row.default_amount = 0
 			component_row.additional_amount = amount