Remove conditional from A/B test meta tag

This was only being output on the page when on the "B" side of the test; the meta tag should be added to the page for all sides of the test so it can be picked up by analytics and the browser extension.

app/views/layouts/application.html.erb

@@ -28,7 +28,7 @@
     <meta name="description" content="<%= strip_tags(@content_item.description) %>" />
   <% end %>
 
-  <%= explore_menu_variant.analytics_meta_tag.html_safe if explore_menu_testable? %>
+  <%= explore_menu_variant.analytics_meta_tag.html_safe %>
 
   <%= yield :extra_head_content %>
 </head>