Remove ‘recent comments’ styling from header

Add this to functions:

function pands_remove_recent_comments_style() {
  global $wp_widget_factory;
  remove_action('wp_head', array($wp_widget_factory->widgets['WP_Widget_Recent_Comments'], 'recent_comments_style'));
}
add_action('widgets_init', 'pands_remove_recent_comments_style');