Remove Atom feeds and old URLs in the form of GET /:username/updates/:id (#11247)

app/javascript/styles/application.scss

@@ -13,7 +13,7 @@
 @import 'mastodon/widgets';
 @import 'mastodon/forms';
 @import 'mastodon/accounts';
-@import 'mastodon/stream_entries';
+@import 'mastodon/statuses';
 @import 'mastodon/boost';
 @import 'mastodon/components';
 @import 'mastodon/polls';