[FIX] website_forum: remove unused close notif event

This code was not used properly and was triggering useless rpc.
This code was used in the deprecated badge system and we forgot to
remove it.

Commit where the code should have been removed:
ec212de5c7

Commit where a quick fix was made:
1e1ea00e66

addons/website_forum/controllers/main.py

@@ -59,12 +59,6 @@ class WebsiteForum(WebsiteProfile):
             })
         return "/forum/%s" % slug(forum_id)
 
-    @http.route('/forum/notification_read', type='json', auth="user", methods=['POST'], website=True)
-    def notification_read(self, **kwargs):
-        if kwargs.get('notification_id'):
-            request.env['mail.message'].browse([int(kwargs.get('notification_id'))]).set_message_done()
-        return True
-
     def sitemap_forum(env, rule, qs):
         Forum = env['forum.forum']
         dom = sitemap_qs2dom(qs, '/forum', Forum._rec_name)

addons/website_forum/static/src/js/website_forum.js

@@ -30,7 +30,6 @@ publicWidget.registry.websiteForum = publicWidget.Widget.extend({
         'click .accept_answer:not(.karma_required)': '_onAcceptAnswerClick',
         'click .favourite_question': '_onFavoriteQuestionClick',
         'click .comment_delete': '_onDeleteCommentClick',
-        'click .notification_close': '_onCloseNotificationClick',
         'click .js_close_intro': '_onCloseIntroClick',
     },
 
@@ -451,22 +450,6 @@ publicWidget.registry.websiteForum = publicWidget.Widget.extend({
             $link.parents('.comment').first().remove();
         });
     },
-    /**
-     * @private
-     * @param {Event} ev
-     */
-    _onCloseNotificationClick: function (ev) {
-        if (!session.is_website_user) {
-            ev.preventDefault();
-            var $link = $(ev.currentTarget);
-            this._rpc({
-                route: '/forum/notification_read',
-                params: {
-                    notification_id: $link.attr('id'),
-                },
-            });
-        }
-    },
     /**
      * @private
      * @param {Event} ev