diff --git a/src/lib/_utils/js/promote-data-aria-attributes.js b/src/lib/_utils/js/promote-data-aria-attributes.js
deleted file mode 100644
index ace70b37a..000000000
--- a/src/lib/_utils/js/promote-data-aria-attributes.js
+++ /dev/null
@@ -1,33 +0,0 @@
-/**
- * Copy `data-aria-*` attributes to matching `aria-*` on the same nodes.
- * For HTML saved through WYSIWYG editors that strip unprefixed ARIA on publish.
- *
- * @param {ParentNode | null | undefined} [root=document]
- */
-export default function promoteDataAriaAttributes(root = document) {
-  if (!root) {
-    return;
-  }
-
-  const elements =
-    root instanceof Document
-      ? root.querySelectorAll('*')
-      : root instanceof Element
-        ? [ root, ...root.querySelectorAll('*') ]
-        : [];
-
-  for (const el of elements) {
-    if (!(el instanceof Element)) {
-      continue;
-    }
-    for (const attr of [ ...el.attributes ]) {
-      if (!attr.name.startsWith('data-aria-')) {
-        continue;
-      }
-      el.setAttribute(
-        'aria-' + attr.name.slice('data-aria-'.length),
-        attr.value
-      );
-    }
-  }
-}