[FIX] hr_holidays: leave_type_request_unit field was declared twice
[FIX] hr_holidays: leave_type_request_unit field was declared twice

closes odoo/odoo#31162

Signed-off-by: Romain Libert (rli) <d3a53ea3f0d6ebbbf1eb8431093f132bc4577d93@odoo.com>
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo