[FIX] website_sale: module sale_coupon is in community

Follow up on https://github.com/odoo/odoo/commit/ac5469646cdea7c0990fbd5092eae26e7e0768ae#diff-04174b6f17e548b9a79222ae09c573db


Before this Commit, upgrade_boolean was applied on sale_coupon module while this has been moved to the community version from v13, so upgrade_boolean is not needed now

closes odoo/odoo#39985

Signed-off-by: Jérémy Kersten (jke) <jke@openerp.com>

addons/website_sale/views/res_config_settings_views.xml

@@ -148,7 +148,7 @@
                     </div>
                     <div class="col-12 col-lg-6 o_setting_box" title="Boost your sales with two kinds of discount programs: promotions and coupon codes. Specific conditions can be set (products, customers, minimum purchase amount, period). Rewards can be discounts (% or amount) or free products.">
                         <div class="o_setting_left_pane">
-                            <field name="module_sale_coupon" widget="upgrade_boolean"/>
+                            <field name="module_sale_coupon" />
                         </div>
                         <div class="o_setting_right_pane">
                             <label for="module_sale_coupon"/>