Cleanup Wordpress Header & use Google Hosted jQuery

gistfile1.php

<?php
/* Cleanup Wordpress Header & use Google Hosted jQuery */

function cleanUp() {
  function restatement_scripts_unversion($src) { 
    if( strpos($src,'ajax.googleapis.com') ) 
      $src=remove_query_arg('ver', $src); 
    return $src; 
  }

  remove_action('wp_head', 'rsd_link');
  remove_action('wp_head', 'feed_links', 2);
  remove_action('wp_head', 'wlwmanifest_link');
  remove_action('wp_head', 'wp_generator');
  remove_action('wp_head', 'bloginfo');
  wp_deregister_script('jquery');
  wp_register_script('jquery', ('http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js'), false, false, true);
  wp_enqueue_script('jquery');
  add_filter('script_loader_src','restatement_scripts_unversion'); 
}    
 
add_action('init', 'cleanUp');

?>