remove WP dashboard widgets

functions.php

function ak_remove_dashboard_widgets() {
	remove_meta_box( 'dashboard_quick_press', 'dashboard', 'side' );
	remove_meta_box( 'dashboard_primary', 'dashboard', 'side' );
	remove_meta_box( 'dashboard_secondary', 'dashboard', 'side' );
	remove_meta_box( 'dashboard_incoming_links', 'dashboard', 'normal' );
	remove_meta_box( 'dashboard_recent_comments', 'dashboard', 'normal');
} 

add_action('wp_dashboard_setup', 'ak_remove_dashboard_widgets' );