Hello Jason Rayner,
You could try mapping the external template for details mode -ListPageDetails.ascx to your NewsView control ( How to map a template
) . To map the template you can use Advanced tab of the Control where you can set SingleItemTemplatePath property to point to the external template.
In this template there is a declaration of JsFileLink control which adds the jQuery script. You may delete the control and the embedded resource will not be added anymore to the page header. This should fix your problem.
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