Improve payload format of Web Push API now that it's open (#7521)

> Good lord what is happening in there

Previously the contents of the Web Push API payloads closely resembled the structure of JavaScript's [Notification](https://developer.mozilla.org/en-US/docs/Web/API/Notification). But now that the API is open to non-browser apps, and given that there is no required coupling between contents of the payload and a Notification object, here is how I changed the payload:

```json
{ 
  "access_token": "...",
  "preferred_locale": "en",
  "notification_id": "12345",
  "notification_type": "follow",
  "title": "So and so followed you",
  "body": "This is my bio",
  "icon": "https://example.com/avatar.png"
}
```

The title, body and icon attributes are included as a fallback so you can construct a minimal notification if you cannot perform a network request to the API to get more data.

1 files changed, 0 insertions, 14 deletions

diff --git a/config/locales/ru.yml b/config/locales/ru.yml
index 2363bba12..19b844612 100644
--- a/config/locales/ru.yml
+++ b/config/locales/ru.yml
@@ -606,20 +606,6 @@ ru:
     other: Другое
     publishing: Публикация
     web: WWW
-  push_notifications:
-    favourite:
-      title: Ваш статус понравился %{name}
-    follow:
-      title: "%{name} теперь подписан(а) на Вас"
-    group:
-      title: "%{count} уведомлений"
-    mention:
-      action_boost: Продвинуть
-      action_expand: Развернуть
-      action_favourite: Нравится
-      title: Вас упомянул(а) %{name}
-    reblog:
-      title: "%{name} продвинул(а) Ваш статус"
   remote_follow:
     acct: Введите username@domain, откуда Вы хотите подписаться
     missing_resource: Поиск требуемого перенаправления URL для Вашего аккаунта завершился неудачей