[IMP] theme_*: enable no-unused-vars rule

closes odoo/design-themes#552

Related: odoo/enterprise#24867
Related: odoo/odoo#85569
Signed-off-by: Géry Debongnie <ged@odoo.com>

theme_notes/static/src/js/tour.js

@@ -1,9 +1,7 @@
 /** @odoo-module */
 
 import wTourUtils from 'website.tour_utils';
-
-const core = require("web.core");
-const _t = core._t;
+import { _t } from 'web.core';
 
 const snippets = [
     {