[FIX] website_sale_wishlist: remove use of Model

The new way of doing rpc is through the rpc function, the web.Model
module is deprecated, so we need to update all calls.

addons/website_sale_wishlist/static/src/js/website_sale_wishlist.js

@@ -2,8 +2,6 @@ odoo.define('website_sale_wishlist.wishlist', function (require) {
 "use strict";
 
 var ajax = require('web.ajax');
-var core = require('web.core');
-var Model = require('web.Model');
 var Widget = require('web.Widget');
 var base = require('web_editor.base');
 var website_sale_utils = require('website_sale.utils');
@@ -83,8 +81,9 @@ var ProductWishlist = Widget.extend({
         var wish = tr.data('wish-id');
         var product = tr.data('product-id');
 
-        new Model('product.wishlist')
-            .call('write', [[wish], { active: false }, base.get_context()])
+        this.rpc('product.wishlist', 'write')
+            .args([[wish], { active: false }, base.get_context()])
+            .exec()
             .then(function(){
                 $(tr).hide();
             });