simplify authorPrefersDark

Author: gordonwoodhull

src/resources/formats/html/templates/quarto-html-before-body.ejs

@@ -164,13 +164,12 @@
       }
     };
 
-    <% if (respectUserColorScheme) { %>
     const authorPrefersDark = <%= darkModeDefault %>;
+    <% if (respectUserColorScheme) { %>
     const queryPrefersDark = window.matchMedia('(prefers-color-scheme: dark)');
     const darkModeDefault = queryPrefersDark.matches;
     <% } else { %>
-    const darkModeDefault = <%= darkModeDefault %>;
-    const authorPrefersDark = <%= darkModeDefault %>;
+    const darkModeDefault = authorPrefersDark;
     <% } %>
 
     <% if (!darkModeDefault) { %>