Theme: Fix summary for v0.134.0

Hugo v0.134.0 changed the return value of the content summary to always be HTML instead of plain text.
So we don't need the work around any more.

themes/ccchh/layouts/_default/summary.html

@@ -1,11 +1,7 @@
 <article class="blog">
   {{- partial "blog-header.html" (dict "headingLink" true "level" 2 "page" . ) }}
   <section>
-    {{- if in .RawContent "<!--more--> " }}
     {{ .Summary | safeHTML }}
-    {{- else }}
-    <p>{{ .Summary | safeHTML }}</p>
-    {{- end }}
     {{- if .Truncated }}
     <div class="morelink"><a href="{{ .RelPermalink }}">mehr...</a></div>
     {{- end }}