Remove popup banner and JS from show request PDFs

We need to remove the popup due to WDTK theme using opacity CSS selector
for these elements this is causing the wkhtmltopdf-static command to seg
fault:
> QPixmap: Cannot create a QPixmap when no GUI is being used
> ...
> Segmentation fault

Also need to remove JS from the page as this causes SSL socket errors:
> QSslSocket: cannot resolve ...
> QSslSocket: cannot call unresolved function ...

Fixes #6435

app/views/layouts/default.html.erb

@@ -52,11 +52,13 @@
     <div class="entirebody">
 
     <a href="#content" class="show-with-keyboard-focus-only skip-to-link" tabindex="0">Skip to content</a>
+      <% unless @render_to_string %>
       <!-- begin popups -->
         <%= render 'general/site_wide_announcement' if site_wide_announcement.present? %>
         <div id="country-message">
         </div>
       <!-- end popups -->
+      <% end %>
 
       <%= render :partial => 'general/responsive_header' %>
 
@@ -81,6 +83,7 @@
       <%= render :partial => 'general/responsive_footer' %>
     </div>
 
+    <% unless @render_to_string %>
     <%= render partial: 'ga_code' unless @user&.is_admin? %>
 
     <%= javascript_include_tag "application" %>
@@ -109,6 +112,7 @@
       </script>
     <% end %>
     <%= content_for :javascript %>
+    <% end %>
 
     <%= render :partial => 'general/before_body_end' %>