To remove top bar of (32px) when loged in wordpress admin

To remove top bar of (32px) when loged in admin panel.

  add_action('get_header', 'my_filter_head');

  function my_filter_head() {
    remove_action('wp_head', '_admin_bar_bump_cb');
  }

By default, if you are seeing the admin bar as a logged in WordPress user, CSS like this will be output in your head (output in the wp_head() function):