Remove stray import

It's included in the main bundle

Author: RealOrangeOne

_includes/head.html

@@ -17,7 +17,6 @@
 
   <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.2.0/css/all.min.css" integrity="sha512-xh6O/CkQoPOWDdYTDqeRdPCVd1SpvCA9XXcUnZS2FmJNp1coAFzvtCN9BmamE+4aHK8yyUHUSCcJHgXloTyT2A==" crossorigin="anonymous" referrerpolicy="no-referrer" />
   <link rel="stylesheet" href="{{ '/css/main.css' | prepend: site.baseurl }}">
-  <link rel="stylesheet" href="{{ '/css/syntax-highlight.css' | prepend: site.baseurl }}">
 
   {% if page.extra_css %}
     {% for css_file in page.extra_css %}