Remove conditional check for javascript_importmap_tags

- Always load importmap tags instead of checking respond_to?
- The conditional might have been preventing importmap from loading
- Ensures JavaScript assets are always included

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: kieranklaassen

app/views/layouts/leva/application.html.erb

@@ -9,10 +9,8 @@
 
     <%= stylesheet_link_tag "leva/application", "data-turbo-track": "reload" %>
     <%= stylesheet_link_tag "leva/application.tailwind", "data-turbo-track": "reload" %>
-    <% if respond_to?(:javascript_importmap_tags) %>
-      <%= javascript_importmap_tags %>
-      <%= javascript_include_tag "application", "data-turbo-track": "reload", type: "module" %>
-    <% end %>
+    <%= javascript_importmap_tags %>
+    <%= javascript_include_tag "application", "data-turbo-track": "reload", type: "module" %>
 
     <%= yield(:head) %>
   </head>