Remove default WP widgets

gistfile1.php

<?php
/**
 * Remove default WordPress widgets
 * 
 * @since 1.0.0
 */
function ja_remove_default_wp_widgets() {
	unregister_widget( 'WP_Widget_Pages'           );
	unregister_widget( 'WP_Widget_Calendar'        );
	unregister_widget( 'WP_Widget_Archives'        );
	unregister_widget( 'WP_Widget_Links'           );
	unregister_widget( 'WP_Widget_Meta'            );
	unregister_widget( 'WP_Widget_Search'          );
	unregister_widget( 'WP_Widget_Text'            );
	unregister_widget( 'WP_Widget_Categories'      );
	unregister_widget( 'WP_Widget_Recent_Posts'    );
	unregister_widget( 'WP_Widget_Recent_Comments' );
	unregister_widget( 'WP_Widget_RSS'             );
	unregister_widget( 'WP_Widget_Tag_Cloud'       );
}
add_action( 'widgets_init', 'ja_remove_default_wp_widgets', 1 );