app/views/users/destroy.js.erb
<% if @saved -%>
remove_user_from_page();
TracksPages.set_page_badge(<%= @total_users %>);
TracksPages.page_notify('notice', '<%= t('users.destroy_successful', :login => @deleted_user.login) %>', 8);
<% else -%>
TracksPages.page_notify('error', '<%= t('users.destroy_error', :login => @deleted_user.login) %>', 8);
<% end -%>
function remove_user_from_page() {
$("#user-<%= @deleted_user.id%>").remove();
}