remove second favicon.ico entry

Author: danielparthier

_includes/head/custom.html

@@ -3,4 +3,3 @@
 <link rel="shortcut icon" href="assets/favicon.ico" />
 <link rel="apple-touch-icon" sizes="180x180" href="assets/apple-touch-icon.png" />
 <link rel="manifest" href="assets/site.webmanifest" />
-<link rel="shortcut icon" href="{{ "assets/favicon.ico" | relative_url }}">