index.html: remove 'settings > selected locus' submenu

This was not really meaningful when displaying several locus on the grid,
and less functional than the 'germline' box in the info panel

browser/index.html

@@ -175,13 +175,15 @@
                         <div class="buttonSelector" onclick="m.changeTimeFormat('delta_date', true)"><input type="radio" name="time" value="delta_date">day after first sample</input></div>
                     </div>
 
+                    <!--
                     <div class="submenu" id="system_menu" style="display:none">
                         <div class="menu_box">
-                            locus/germline (for color and scatterplot)</br>
+                            selected locus/germline (for the grid)</br>
                             <ul id="germline_list">
                             </ul>
                         </div>
                     </div>
+                    -->
 
                     <!--menu graph/dbscan -->
                     <div class="submenu" style="display:none">