Remove the Screen Options and Help Tab in Dashboard

How can I remove the 2 panels in WordPress Admin Dashboard?

Insert this code on your functions.php file or plugin:

[php]
render_screen_layout();
$wp_screen_object->render_per_page_options();
return false;
}
return true;
}
/**
* Remove the Help Tab
**/
add_action(‘admin_head’, ‘wpster_remove_help_tabs’);
function wpster_remove_help_tabs() {
$screen = get_current_screen();
$screen->remove_help_tabs();
}
?>
[/php]