Hi there,
so what you’re seeing is the xmlns
and xmlns:xlink
attributes.
These are not links and are never followed – they are an XML Namespace and are used to make the Doctype Declaration (DTD) – in real simple terms they tell the Browser which “Rules” to follow when interpreting this document type.
So there is no negative value here, and there would be no benefit ( security or ranking ) in changing it to HTTPS instead that may actually make the code invalid.