chore: remove duplicate code (#28646)

[skip ci]
diff --git a/erpnext/hr/doctype/employee/employee.py b/erpnext/hr/doctype/employee/employee.py
index 79e8f61..88e5ca9 100755
--- a/erpnext/hr/doctype/employee/employee.py
+++ b/erpnext/hr/doctype/employee/employee.py
@@ -96,15 +96,8 @@
 			'user': self.user_id
 		})
 
-		if employee_user_permission_exists: return
-
-		employee_user_permission_exists = frappe.db.exists('User Permission', {
-			'allow': 'Employee',
-			'for_value': self.name,
-			'user': self.user_id
-		})
-
-		if employee_user_permission_exists: return
+		if employee_user_permission_exists:
+			return
 
 		add_user_permission("Employee", self.name, self.user_id)
 		set_user_permission_if_allowed("Company", self.company, self.user_id)