Multiple empty nested elements generated when saving a page

Example:

<div>
    <div>
        <span>
            <span>Word</span>
        </span>
        <span>
            Other <span>text</span>
        </span>
    </div>
</div>

These empty, unnecessary elements (div and span) should be removed.
Perhaps they are used for styling, but this will not be a problem because the styling filter will be applied before cleaning.