DEV: removes unnecessary jquery selector (#14945)

DEV: removes unnecessary jquery selector (#14945)

diff --git a/app/assets/javascripts/discourse/app/lib/theme-selector.js b/app/assets/javascripts/discourse/app/lib/theme-selector.js
index 4d7c9a9..7d6ca35 100644
--- a/app/assets/javascripts/discourse/app/lib/theme-selector.js
+++ b/app/assets/javascripts/discourse/app/lib/theme-selector.js
@@ -16,7 +16,7 @@ export function currentThemeKey() {
 
 export function currentThemeIds() {
   const themeIds = [];
-  const elem = $(keySelector)[0];
+  const elem = document.querySelector(keySelector);
   if (elem) {
     elem.content.split(",").forEach((num) => {
       num = parseInt(num, 10);

GitHub sha: c9a84d8067f47ce44b123f5fd4eb4a07ad085b8f

This commit appears in #14945 which was approved by CvX. It was merged by jjaffeux.