function deleteDocumentAncestorsMetadata() {
  whatApp = String(app.name); //String version of the app name
  if (whatApp.search("Photoshop") > 0) {
    //Check for photoshop specifically, or this will cause errors
    //Function Scrubs Document Ancestors from Files
    if (!documents.length) {
      alert(
        "There are no open documents. Please open a file to run this script."
      );
      return;
    }
    if (ExternalObject.AdobeXMPScript == undefined)
      ExternalObject.AdobeXMPScript = new ExternalObject("lib:AdobeXMPScript");
    var xmp = new XMPMeta(activeDocument.xmpMetadata.rawData);
    // Begone foul Document Ancestors!
    xmp.deleteProperty(XMPConst.NS_PHOTOSHOP, "DocumentAncestors");
    app.activeDocument.xmpMetadata.rawData = xmp.serialize();
  }
}
//Now run the function to remove the document ancestors
deleteDocumentAncestorsMetadata();

var xmp = new XMPMeta(activeDocument.xmpMetadata.rawData);
// Begone foul Document Ancestors!
xmp.deleteProperty(XMPConst.NS_PHOTOSHOP, "DocumentAncestors");
app.activeDocument.xmpMetadata.rawData = xmp.serialize();