remove duplicate icon and fix incorrect favicon type

[coliff]

image/x-icon is only for .ico files. image/png should be used for .png

[matalo33]

As per https://perishablepress.com/everything-you-ever-wanted-to-know-about-favicons/ should the type actually be "image/ico"?

[coliff]

It'd only be "image/ico" if the file extension was .ico

[matalo33]

A part of the page I linked mentions this:

If your favicon is formatted as .gif, .jpg, or .png, the correct MIME type is “image/ico,” as represented by type="image/ico"

You may indeed be correct and the type should be image/png, I just would like to be sure.

[coliff]

Yep, I'm pretty certain that image-png is correct. The W3 Org says so https://www.w3.org/TR/PNG/#A-Media-type and that's what Bootstrap, the most popular CSS framework uses: https://github.com/twbs/bootstrap/blob/master/site/_includes/favicons.html

[matalo33]

Thanks @coliff 👍