Revert "update postcss config for glightbox"

This reverts commit d8e4536bab.

themes/hugoplate/layouts/partials/page-header.html

@@ -1,9 +0,0 @@
-<section>
-  <div class="container text-center">
-    <div
-      class="from-body to-theme-light dark:from-darkmode-body dark:to-darkmode-theme-light rounded-2xl bg-gradient-to-b px-8 py-14">
-      <h1>{{ .Title | title }}</h1>
-      {{ partial "components/breadcrumb" (dict "Context" . "Class" "mt-6") }}
-    </div>
-  </div>
-</section>