[REF] doc: promisify doc examples

Also remove a file on async stuff as its content is outdated, and
actually not used.

1 files changed, 2 insertions, 2 deletions

diff --git a/doc/howtos/web.rst b/doc/howtos/web.rst
index df44ff25eba..550ffeffea1 100644
--- a/doc/howtos/web.rst
+++ b/doc/howtos/web.rst
@@ -1544,10 +1544,10 @@ Exercises
                 local.HomePage = instance.Widget.extend({
                     template: "HomePage",
                     start: function () {
-                        return $.when(
+                        return Promise.all([
                             new local.PetToysList(this).appendTo(this.$('.oe_petstore_homepage_left')),
                             new local.MessageOfTheDay(this).appendTo(this.$('.oe_petstore_homepage_right'))
-                        );
+                        ]);
                     }
                 });
                 instance.web.client_actions.add('petstore.homepage', 'instance.oepetstore.HomePage');