Prevent loading of Twitter and FB script on Home Page

Hello,

The following script loads in the index page of my blog although there is no social media element in my homepage. [I picked it from the source code of my blog http://www.bloggercent.com]

<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");</script><script type="text/javascript">
  (function() {
    var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true;
    po.src = 'https://apis.google.com/js/plusone.js';
    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s);
  })();
</script><script>(function(d, s, id) {
  var js, fjs = d.getElementsByTagName(s)[0];
  if (d.getElementById(id)) return;
  js = d.createElement(s); js.id = id;
  js.src = "//connect.facebook.net/en_US/all.js#xfbml=1&appId=136911316406581";
  fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>

I am also not using any social media plugin. But I don’t know how the twitter, Google Plus and facebook share button script gets loaded on my homepage. I tried deactivating many of the plugins which have the social media element in them, but it did not help. How do I get rid of this or at least block the loading of these 3 scripts so as to reduce the number of requests?