Fix sidebar rendering for narrow viewports

Fix a bug that's noticeable when the viewport is narrow: you can toggle
the menu, but that menu is actually blank.

Author: Tim Bannister

layouts/partials/head.html

@@ -88,6 +88,5 @@
 {{- end -}}
 <script defer src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>
 {{- end -}}
-<script src="{{ "/js/script.js" | relURL }}"></script>
 {{ with .Params.js }}{{ range (split . ",") }}<script src="{{ (trim . " ") | relURL }}"></script><!-- custom js added -->
 {{ end }}{{ else }}<!-- no custom js detected -->{{ end }}