Revert "Fix render breakage introduced in theNewDynamic#665"

This reverts commit bbd9d80.

layouts/index.html

@@ -45,7 +45,7 @@ <h2 class="f5 fw4 mb4 dib {{ cond (eq $.Site.Language.LanguageDirection "rtl") "
           {{ end }}
 
           {{/* As above, Use $section_name to get the section title, and URL. Use "with" to only show it if it exists */}}
-          {{ with $.Site.GetPage "section" $section_name }}
+          {{ with .Site.GetPage "section" $section_name }}
             <a href="{{ .RelPermalink }}" class="link db f6 pa2 br3 bg-mid-gray white dim w4 tc">{{ i18n "allTitle" . }}</a>
           {{ end }}
           </section>