Removed invalid "shortcut icon" HTML element #3941
Merged
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Many templates have this "shortcut icon" element (which is just the favicon btw) but shortcut icon is not a valid "rel" type, as explained here: https://www.w3schools.com/tags/att_link_rel.asp
Also, in this page we find:
That's why this PR removes it.
Note that all templates also have a "icon" link so "shortcut" should be double useless