hugo: remove unused templates

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

layouts/partials/api-aside.html

@@ -1,3 +0,0 @@
-<aside class="space-y-4 w-[300px] lg:hidden">
-  {{ partial "toc-api.html" . }}
-</aside>

layouts/partials/mermaid.html

@@ -1,2 +0,0 @@
-<script type="module">
-</script>

layouts/partials/toc-api.html

@@ -1,18 +0,0 @@
-<div class="text-lg pb-2">{{ T "tableOfContents" }}</div>
-<nav id="TableOfContents">
-  <ul>
-    {{ $openapi := index site.Data.api .Params.apidata }}
-    {{ range $path, $pathKeys := $openapi.paths }}
-      {{ range $key, $properties := $pathKeys }}
-        {{ if in "get put patch post delete" $key }}
-          <li>
-            <a
-              href="#{{ $properties.operationId | default (urlize $properties.summary) }}"
-              >{{ $properties.summary }}</a
-            >
-          </li>
-        {{ end }}
-      {{ end }}
-    {{ end }}
-  </ul>
-</nav>