Remove JavaScript from the header template

layouts/partials/header.html

@@ -1,32 +1,14 @@
 <header class="header">
   {{ if .IsHome }}
   <h1 class="logo">
-    <a class="site-name" href="{{ `` | absURL }}">{{ site.Title }}</a><a class="btn-dark"></a>
+    <a class="site-name" href="{{ `` | absURL }}">{{ site.Title }}</a>
   </h1>
   {{ else }}
   <p class="logo">
-    <a class="site-name" href="{{ `` | absURL }}">{{ site.Title }}</a><a class="btn-dark"></a>
+    <a class="site-name" href="{{ `` | absURL }}">{{ site.Title }}</a>
   </p>
   {{ end }}
 
-  <script>
-    let bodyClx = document.body.classList;
-    let btnDark = document.querySelector('.btn-dark');
-    let sysDark = window.matchMedia('(prefers-color-scheme: dark)');
-    let darkVal = localStorage.getItem('dark');
-
-    let setDark = (isDark) => {
-      bodyClx[isDark ? 'add' : 'remove']('dark');
-      localStorage.setItem('dark', isDark ? 'yes' : 'no');
-    };
-
-    setDark(darkVal ? darkVal === 'yes' : sysDark.matches);
-    requestAnimationFrame(() => bodyClx.remove('not-ready'));
-
-    btnDark.addEventListener('click', () => setDark(!bodyClx.contains('dark')));
-    sysDark.addEventListener('change', (event) => setDark(event.matches));
-  </script>
-
   {{ $url := .RelPermalink }}<!---->
   {{ with site.Menus.main }}
   <nav class="menu">