site: simplify base templates

Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>

layouts/wide.html

@@ -1,11 +1 @@
-{{ define "main" }}
-  <article class="prose dark:prose-invert max-w-4xl min-w-0 flex-[2_2_0%]">
-    {{ partial "breadcrumbs.html" . }}
-    <h1 data-pagefind-weight="10">{{ .Title }}</h1>
-    <div class="block lg:hidden">
-      {{ partialCached "pagemeta.html" . . }}
-      <hr />
-    </div>
-    {{ .Content }}
-  </article>
-{{ end }}
+{{ define "right" }}{{ end }}