Remove duplicate code

src/webui/www/private/views/preferences.html

@@ -2115,7 +2115,6 @@
             }
             settings.set('max_ratio_enabled', $('max_ratio_checkbox').getProperty('checked'));
             settings.set('max_ratio', max_ratio);
-            settings.set('max_ratio_act', $('max_ratio_act').getProperty('value').toInt());
 
             let max_seeding_time = -1;
             if ($('max_seeding_time_checkbox').getProperty('checked')) {