The Hero call to action (CTA), once translated, if someone then removes the source language version of CTA, the translated CTA is not able to be updated or removed, as the CTA is no longer visible on the translation page. There is a bug ticket on this, but in case you run into this before it is fixed
Work around: add in a CTA temporary text on the webpage, save, then go to the translations for the page and remove the text there in the CTA. Once it is removed, then remove the temporary CTA in the source language. Things should then be cleaned up.