Drop broken "@ symbol as icon" setting

It was merged into pleroma-fe on 2022-02-03 in
76547fe66d and imported
into akkoma-fe on 2022-06-08 with the merge commit
f6cf509a04.

However, something went wrong in the merge and while the setting
and its infrastructure exist, it is never used anywhere and @ is
always displayed as text.

Given it existed in this broken state for nearly one and a half years,
never worked on akkoma-fe and no bugs were filed about this, it appears
nobody cares, so let’s just remove it.

src/components/mention_link/mention_link.js

@@ -93,9 +93,6 @@ const MentionLink = {
         this.highlightType
       ]
     },
-    useAtIcon () {
-      return this.mergedConfig.useAtIcon
-    },
     isRemote () {
       return this.userName !== this.userNameFull
     },

src/components/settings_modal/tabs/general_tab.vue

@@ -483,14 +483,6 @@
             </BooleanSetting>
           </li>
         </ul>
-        <li>
-          <BooleanSetting
-            path="useAtIcon"
-            expert="1"
-          >
-            {{ $t('settings.use_at_icon') }}
-          </BooleanSetting>
-        </li>
         <li>
           <BooleanSetting path="mentionLinkShowAvatar">
             {{ $t('settings.mention_link_show_avatar') }}

src/i18n/ca.json

@@ -884,7 +884,6 @@
         "upload_a_photo": "Pujar una foto",
         "useStreamingApi": "Rebre apunts i notificacions en temps real",
         "useStreamingApiWarning": "És genial emprar-lo. Si es trenca, refresca, suposo?",
-        "use_at_icon": "Mostra el símbol {'@'} com a icona enlloc de text",
         "use_contain_fit": "No retallar els adjunts en miniatures",
         "use_one_click_nsfw": "Obre els adjunts NSFW amb només un clic",
         "user_mutes": "Usuaris",

src/i18n/de.json

@@ -916,7 +916,6 @@
         "upload_a_photo": "Lade ein Foto hoch",
         "useStreamingApi": "Empfange Posts und Benachrichtigungen in Echtzeit",
         "useStreamingApiWarning": "(Nicht empfohlen, experimentell, bekannt dafür, Posts zu überspringen)",
-        "use_at_icon": "{'@'}-Symbol als Icon und nicht als Text anzeigen",
         "use_blurhash": "Blurhash für NSFW-Vorschauen verwenden",
         "use_contain_fit": "Vorschaubilder nicht zuschneiden",
         "use_one_click_nsfw": "Heikle Anhänge mit nur einem Klick öffnen",

src/i18n/en.json

@@ -922,7 +922,6 @@
         "upload_a_photo": "Upload a photo",
         "useStreamingApi": "Receive posts and notifications real-time",
         "useStreamingApiWarning": "It's cool use it. If it breaks refresh I guess?",
-        "use_at_icon": "Display {'@'} symbol as an icon instead of text",
         "use_contain_fit": "Don't crop the attachment in thumbnails",
         "use_one_click_nsfw": "Open NSFW attachments with just one click",
         "user_mutes": "Users",

src/i18n/fr.json

@@ -920,7 +920,6 @@
         "upload_a_photo": "Envoyer une photo",
         "useStreamingApi": "Recevoir les messages et notifications en temps réel",
         "useStreamingApiWarning": "(Non recommandé, expérimental, connu pour rater des messages)",
-        "use_at_icon": "Afficher le symbol {'@'} comme une image",
         "use_contain_fit": "Ne pas rogner les miniatures des pièces-jointes",
         "use_one_click_nsfw": "Ouvrir les pièces-jointes sensibles avec un seul clic",
         "user_mutes": "Comptes",

src/i18n/ja_pedantic.json

@@ -921,7 +921,6 @@
         "upload_a_photo": "画像をアップロード",
         "useStreamingApi": "投稿と通知を、すぐに受け取る",
         "useStreamingApiWarning": "（実験中で、投稿を取りこぼすかもしれないので、おすすめしません）",
-        "use_at_icon": "{'@'}マークをアイコンにする",
         "use_contain_fit": "画像のサムネイルを、切り抜かない",
         "use_one_click_nsfw": "NSFWなファイルを1クリックで開く",
         "user_mutes": "ユーザー",

src/i18n/nl.json

@@ -918,7 +918,6 @@
         "upload_a_photo": "Foto uploaden",
         "useStreamingApi": "Berichten en meldingen in real-time ontvangen",
         "useStreamingApiWarning": "Iets experimenteels met berichten streamen uwu miss kun je beter uit laten ofzo?",
-        "use_at_icon": "{'@'} symbool als icoon tonen in plaats van tekst",
         "use_blurhash": "Waas tonen over NSFW-miniaturen",
         "use_contain_fit": "Bijlage in miniaturen niet bijsnijden",
         "use_one_click_nsfw": "Gevoelige bijlagen met slechts één klik openen",

src/i18n/uk.json

@@ -922,7 +922,6 @@
         "upload_a_photo": "Вивантажити фото",
         "useStreamingApi": "Отримувати дописи та сповіщення наживо",
         "useStreamingApiWarning": "Загалом працює. Якщо не зовсім, спробуєте оновити сторінку?",
-        "use_at_icon": "Значок {'@'} замість символу",
         "use_blurhash": "Показувати дражливі мініатюри (як розмиті кольори)",
         "use_contain_fit": "Не обрізати краї мініатюр",
         "use_one_click_nsfw": "Відкривати NSFW вкладення одним кліком миші",

src/i18n/zh.json

@@ -922,7 +922,6 @@
         "upload_a_photo": "上传照片",
         "useStreamingApi": "实时接收帖文和通知",
         "useStreamingApiWarning": "十分炫酷推荐使用。要是崩了试试刷新？",
-        "use_at_icon": "将 {'@'} 符号显示为图标而不是文本",
         "use_blurhash": "对NSFW的缩略图使用模糊处理",
         "use_contain_fit": "生成缩略图时不要裁剪附件",
         "use_one_click_nsfw": "点击一次以打开工作场所不适宜（NSFW）的附件",

src/modules/config.js

@@ -95,7 +95,6 @@ export const defaultState = {
   disableStickyHeaders: false,
   showScrollbars: false,
   greentext: undefined, // instance default
-  useAtIcon: undefined, // instance default
   mentionLinkDisplay: undefined, // instance default
   mentionLinkShowTooltip: undefined, // instance default
   mentionLinkShowAvatar: undefined, // instance default

src/modules/instance.js

@@ -21,7 +21,6 @@ const defaultState = {
   background: '/static/aurora_borealis.jpg',
   collapseMessageWithSubject: true,
   greentext: false,
-  useAtIcon: false,
   mentionLinkDisplay: 'short',
   mentionLinkShowTooltip: true,
   mentionLinkShowAvatar: false,