Stylesheet is loaded in with media='print' - move to CSS
This means that the URL in question loads in a specific stylesheet just for printing.
Why is this important?
This requires the browser to load the printing stylesheet, even if it is not going to be used.
Modern browsers will recognise that the file is not required to render the page, so it will not download it in a manner that blocks rendering, but it will still download the file when it may not actually be required.
What does the Hint check?
This Hint will trigger for any internal URL which contains a <link> element calling a specific 'print' stylesheet.
Examples that trigger this Hint:
The Hint would trigger for any URL with a separate 'print' style sheet called in the HTML:
How do you resolve this issue?
These styles should be moved to a @media print query in your main CSS (at the bottom), to avoid the additional request necessary to download the separate 'print' stylesheet.