`(.log js/console "load-ref" iframe-dom)` was left in the iframe
ref callback of `frame-preview`. Mirrors the defect PR #9243
removed from `color-row*` — fires on every ref invocation and
pollutes the browser console.
Signed-off-by: jack-stormentswe <crazycoder131@gmail.com>
Signed-off-by: Andrey Antukh <niwi@niwi.nz>
Co-authored-by: Andrey Antukh <niwi@niwi.nz>