[IMP] sale: remove useless call in discount widget

Following up https://github.com/odoo/odoo/pull/112692 that avoided the use
of the 'Number' javascript function in the 'product_discount_field' widget, the
call to that function was left in the code. It is useless and can be removed
since the value of the new field used, the property field 'props.value', is
already a float.

closes odoo/odoo#112891

X-original-commit: fb8b217f8bd2323d33bbeb949f35cd1620557960
Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>

addons/sale/static/src/js/product_discount_field.js

@@ -37,7 +37,7 @@ export class ProductDiscountField extends FloatField {
                         return {
                             operation: "UPDATE",
                             record: line,
-                            data: {["discount"]: Number(this.props.value)},
+                            data: {["discount"]: this.props.value},
                         };
                     });