If you mean the default WordPress Widgets, you would add this to the functions.php file:
<?php
// unregister all default WP Widgets
function unregister_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');
unregister_widget('WP_Nav_Menu_Widget');
}
add_action('widgets_init', 'unregister_default_wp_widgets', 1);
?>
EDIT:
register_sidebar(array('name'=>'sidebar2',
'before_widget' => '<ul><li>',
'after_widget' => "</li></ul>",
'before_title' => '<h2 class="widgettitle">',
'after_title' => "</h2>"
));
Where it says Sidebar2, is where you can add your title for the sidebar position. Just be sure it is relative to the actual position.
4
solved Removing the default sidebar from admin panel