Make series cover cache invisible

cps/templates/admin.html

@@ -178,10 +178,10 @@
             <div class="col-xs-6 col-sm-3">{{_('Generate book cover thumbnails')}}</div>
             <div class="col-xs-6 col-sm-3">{{ display_bool_setting(config.schedule_generate_book_covers) }}</div>
           </div>
-          <div class="row">
+          <!--div class="row">
             <div class="col-xs-6 col-sm-3">{{_('Generate series cover thumbnails')}}</div>
             <div class="col-xs-6 col-sm-3">{{ display_bool_setting(config.schedule_generate_series_covers) }}</div>
-          </div>
+          </div-->
         </div>
       <a class="btn btn-default scheduledtasks" id="admin_edit_scheduled_tasks" href="{{url_for('admin.edit_scheduledtasks')}}">{{_('Edit Scheduled Tasks Settings')}}</a>
     </div>

cps/templates/schedule_edit.html

@@ -28,10 +28,10 @@
       <input type="checkbox" id="schedule_generate_book_covers" name="schedule_generate_book_covers" {% if config.schedule_generate_book_covers %}checked{% endif %}>
       <label for="schedule_generate_book_covers">{{_('Generate Book Cover Thumbnails')}}</label>
     </div>
-    <div class="form-group">
+    <!--div class="form-group">
       <input type="checkbox" id="schedule_generate_series_covers" name="schedule_generate_series_covers" {% if config.schedule_generate_series_covers %}checked{% endif %}>
       <label for="schedule_generate_series_covers">{{_('Generate Series Cover Thumbnails')}}</label>
-    </div>
+    </div-->
     <button type="submit" name="submit" value="submit" class="btn btn-default">{{_('Save')}}</button>
     <a href="{{ url_for('admin.admin') }}" id="email_back" class="btn btn-default">{{_('Cancel')}}</a>
   </form>