Don't show kyujitai info when no kyujitai

themes/tegakituesday.com/layouts/challenges/single.html

@@ -14,7 +14,7 @@
 		<button id="direction" title="Text direction">↕</button>
 		<button lang="ja" id="highlight" title="Vocab/kanji links">漢字</button>
 		<button lang="ja" id="kyujitai" title="Shinjitai/kyujitai">旧字体</button>
-		<a target="_blank" class="clickable-icon" href="https://en.wikipedia.org/wiki/Ky%C5%ABjitai"><i class="fa-solid fa-circle-question"></i></a>
+		<a id="kyujitai-info" target="_blank" class="clickable-icon" href="https://en.wikipedia.org/wiki/Ky%C5%ABjitai"><i class="fa-solid fa-circle-question"></i></a>
 		<header>
 			<h3>Tegaki Tuesday #{{- $current -}}</h3>
 			<small><ruby>手<rp>(</rp><rt>て</rt><rp>)</rp></ruby><ruby>書<rp>(</rp><rt>が</rt><rp>)</rp></ruby>きの<ruby>火<rp>(</rp><rt>か</rt><rp>)</rp></ruby><ruby>曜<rp>(</rp><rt>よう</rt><rp>)</rp></ruby><ruby>日<rp>(</rp><rt>び</rt><rp>)</rp></ruby>＃{{- $current -}}・<time datetime="{{- .Date.Format " 2006-01-02T15:04:05Z07:00" -}}">{{- .Date.Format "2006年01月02日" -}}</time></small>

themes/tegakituesday.com/static/js/toggle.js

@@ -36,6 +36,8 @@ for (let i = 0; i < rubies.length; i++) {
 const kyujitaiButton = document.getElementById("kyujitai");
 if (kyujitaiConvertable.length === 0) {
 	kyujitaiButton.parentNode.removeChild(kyujitaiButton);
+	const kyujitaiInfo = document.getElementById("kyujitai-info");
+	kyujitaiInfo.parentNode.removeChild(kyujitaiInfo);
 } else {
 	document.getElementById("kyujitai").addEventListener("click", function() {
 		let kyujitai = false;