Revert "Add the ability for post headers to be links when you add a link parameter to the page front matter"

This reverts commit d68e76478d.

assets/styles/root.css

@@ -470,14 +470,6 @@ header > span.series::before {
     padding-bottom: 0;
 }
 
-.post-title h1 > .link-arrow {
-    margin-inline-start: 0.5rem;
-    text-decoration: none;
-}
-.post-title h1 > .link-arrow:hover {
-    text-decoration: none;
-}
-
 .post-title > .post-date {
     color: var(--light-dim);
     display: inline-block;

layouts/partials/content_header.html

@@ -1,7 +1,7 @@
 <header>
   {{ partial "development/draft_tag.html" . }}
   <div class="post-title">
-    <h1>{{ .Title }}{{ with .Params.link }}<a class="link-arrow" href="{{ . }}">→</a>{{ end }}</h1>
+    <h1>{{ .Title }}</h1>
     {{ if not (eq .Section "about") }}
       <div class="post-date"><time>{{ .Date | time.Format "January 2, 2006" }}</time></div>
     {{ end }}