Merge commit 'a7264a2b42631bd876d114b96f689492e2908a8d' into glitch-soc/merge-upstream

Conflicts:
- `app/views/layouts/application.html.haml`:
  Conflict because of glitch-soc's different theming system.
  Ported upstream's change.

app/javascript/mastodon/features/compose/components/language_dropdown.jsx

@@ -110,18 +110,6 @@ class LanguageDropdownMenu extends PureComponent {
     }).map(result => result.obj);
   }
 
-  frequentlyUsed () {
-    const { languages, value } = this.props;
-    const current = languages.find(lang => lang[0] === value);
-    const results = [];
-
-    if (current) {
-      results.push(current);
-    }
-
-    return results;
-  }
-
   handleClick = e => {
     const value = e.currentTarget.getAttribute('data-index');