[UI] removes logs and old stats page (in HTML) (#4474)

removes logs and old stats page (in HTML) and corresponding tests

templates/class-overview.html

@@ -50,8 +50,6 @@ <h1>{{ class_info.name }}</h1><span class="cursor-pointer" onclick='hedyApp.rena
                 <button class="green-btn" id="customize-class-button" data-cy="customize_class_button" onclick="window.location.href = '/for-teachers/customize-class/{{class_info.id}}'">{{_('customize_class')}}</button>
             {% endif %}
             <button class="green-btn" id="live_stats_button" onclick="window.location.href = '/live_stats/class/{{class_info.id}}'">{{_('class_live')}}</button>
-            <button class="green-btn" id="stats_button" onclick="window.location.href = '/stats/class/{{class_info.id}}'">{{_('class_stats')}}</button>
-            <button class="green-btn" id="logs_button" onclick="window.location.href = '/logs/class/{{class_info.id}}'">{{_('class_logs')}}</button>
             <button class="green-btn" id="grid_overview_button" onclick="window.location.href = '/grid_overview/class/{{class_info.id}}'">{{_('grid_overview')}}</button>
         </div>
         <div class="flex ltr:ml-auto rtl:mr-auto">