That’s all probably default sidebar stuff. So if you go to appearance->widgets, and put widgets into your sidebar, it’ll most likely make the stuff (including meta) on your sidebar disappear.
You can also directly edit your theme’s sidebar.php file to remove the meta stuff.
it’ll be a block of code looking similar to:
<h2>Meta</h2>
<ul>
<li><a href="<?php bloginfo('rss2_url'); ?>" title="<?php _e('Syndicate this site using RSS'); ?>"><?php _e('<abbr title="Really Simple Syndication">RSS</abbr>'); ?></a></li>
<li><a href="<?php bloginfo('comments_rss2_url'); ?>" title="<?php _e('The latest comments to all posts in RSS'); ?>"><?php _e('Comments <abbr title="Really Simple Syndication">RSS</abbr>'); ?></a></li>
<?php wp_meta(); ?>
</ul>