Remove bulk option row

How can I remove bulk actions section from post and page lists pages on wordpress

I tried with following code in functions.php as suggested on another thread but it does nothing

add_action( 'wp_loaded', 'wpse_53371_remove_bulk_actions' );
function wpse_53371_remove_bulk_actions()
{
    add_filter( 'bulk_actions-edit-post', '__return_empty_array' );
    add_filter( 'bulk_actions-upload',    '__return_empty_array' );
}

Should I hide it will css ?