WordPress remove core dashboard widgets

rm_dashboard_widgets.php

<?php
add_action('wp_dashboard_setup', 'rm_dashboard_widgets');
function rm_dashboard_widgets() {
	global $wp_meta_boxes;
	unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_right_now']);         		// right now [content, discussion, theme, etc]
	unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_plugins']);              // plugins
	unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_incoming_links']);       // incoming links
	unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_primary']);                // wordpress blog
	unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_secondary']);              // other wordpress news
	unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_quick_press']);            // quickpress
	unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_recent_drafts']);          // drafts
	unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_comments']);      // comments
}

/* NOTE: you can comment out the dashboard widgets to keep*/