rm side nav (#7297)

docs/api_reference/themes/scikit-learn-modern/nav.html

@@ -16,22 +16,6 @@
   {%- set development_attrs = '' %}
 {%- endif %}
 
-{# title, link, link_attrs #}
-{%- set drop_down_navigation = [
-  ('Getting Started', pathto('getting_started'), ''),
-  ('Tutorial', pathto('tutorial/index'), ''),
-  ("What's new", pathto('whats_new/v' + version), ''),
-  ('Glossary', pathto('glossary'), ''),
-  ('Development', development_link, development_attrs),
-  ('FAQ', pathto('faq'), ''),
-  ('Support', pathto('support'), ''),
-  ('Related packages', pathto('related_projects'), ''),
-  ('Roadmap', pathto('roadmap'), ''),
-  ('Governance', pathto('governance'), ''),
-  ('About us', pathto('about'), ''),
-  ('GitHub', 'https://github.com/scikit-learn/scikit-learn', ''),
-  ('Other Versions and Download', 'https://scikit-learn.org/dev/versions.html', '')]
--%}
 
 <nav id="navbar" class="{{ nav_bar_class }} navbar navbar-expand-md navbar-light bg-light py-0">
   <div class="container-fluid {{ top_container_cls }} px-0">