remove unneeded CSS class

* introduced in c5afdc1

Author: rossengeorgiev

index.html

@@ -101,7 +101,7 @@ <h2><i class="icon-settings rfloat"></i>Settings</h2>
             <div class="row option">
                 <span><b>Cloud layer</b></span>
                 <div class="switch off" id="sw_layers_clouds">
-                    <span class="thumb hourswitch"></span>
+                    <span class="thumb"></span>
                     <input type="checkbox" id="opt_layers_clouds">
                 </div>
             </div>
@@ -115,14 +115,14 @@ <h2><i class="icon-settings rfloat"></i>Settings</h2>
             <div class="row option">
                 <span><b>Horizontal speed in hours</b></span>
                 <div class="switch off" id="sw_haxis_hours">
-                    <span class="thumb hourswitch"></span>
+                    <span class="thumb"></span>
                     <input type="checkbox" id="opt_haxis_hours">
                 </div>
             </div>
             <div class="row option">
                 <span><b>Hide receivers from the map</b></span>
                 <div class="switch off" id="sw_hide_receivers">
-                    <span class="thumb hourswitch"></span>
+                    <span class="thumb"></span>
                     <input type="checkbox" id="opt_hide_receivers">
                 </div>
             </div>