refactor: remove all unused imports (#9951)

Co-authored-by: tamaina <tamaina@hotmail.co.jp>

packages/frontend/src/pages/admin-file.vue

@@ -75,7 +75,6 @@ import bytes from '@/filters/bytes';
 import * as os from '@/os';
 import { i18n } from '@/i18n';
 import { definePageMetadata } from '@/scripts/page-metadata';
-import { acct } from '@/filters/user';
 import { iAmAdmin, iAmModerator } from '@/account';
 
 let tab = $ref('overview');