fix: remove floating search button

Search functionality is available via the search input in the header.
Floating button was competing with chat widget for space.

Author: neuromechanist

_layouts/default.html

@@ -189,12 +189,6 @@ <h2 class="text-delta">Table of contents</h2>
     </div>
 
     {% if site.search_enabled != false %}
-      {% if site.search.button %}
-        <a href="#" id="search-button" class="search-button" style="bottom: 130px;">
-          <svg viewBox="0 0 24 24" class="icon"><use xlink:href="#svg-search"></use></svg>
-        </a>
-      {% endif %}
-
       <div class="search-overlay"></div>
     {% endif %}
   </div>