Remove heading-link class

It was used to make both website title and page titles in summaries not
have link color. Instead, just directly configure those elements.

assets/css/bobastyle.css

@@ -207,12 +207,6 @@ a:hover {
   text-decoration: underline;
 }
 
-/* this is also used i.e. in page-title */
-.heading-link {
-  color: inherit;
-  text-weight: bold;
-}
-
 blockquote {
   border-left: 5px solid var(--background-2);
   padding-left: 15px;
@@ -348,6 +342,11 @@ footer p {
   align-items: center;
 }
 
+.header a {
+  color: inherit;
+  font-weight: bold;
+}
+
 .navbar {
   display: flex;
   flex-wrap: wrap;
@@ -496,6 +495,10 @@ footer p {
   margin-bottom: 10px;
 }
 
+.page-title a {
+  color: inherit;
+}
+
 .page-title h1 {
   margin: 0;
 }