@dana 
You can remove an empty iframe using jQuery by selecting the empty iframe element and then calling the remove() method on it. Here is an example code snippet:
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// Select the empty iframe element
var iframe = $('iframe:empty');
// Remove the empty iframe element
iframe.remove();
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This code will select all empty iframe elements on the page and then remove them from the DOM. Make sure to place this code within a document.ready function to ensure that the iframe elements are present in the DOM before attempting to remove them.