Hide commentary boxes by code

Good afternoon .. this code is the comments page of my blog ( comments.php ) . What lines do I delete to delete the comment boxes . I would leave only comments facebook , but for this I need to hide the wordpress comment box . What deleto to hide ?

<?php
//Required password to comment
if ( post_password_required() ) { ?>
<p><?php _e( ‘This post is password protected. Enter the password to view comments.’, THEMEDOMAIN ); ?></p>
<?php
return;
}

//Display Comments
if( have_comments() ) : ?>

<h5 class=”cufon”><?php comments_number(‘No comment’, ‘Comment’, ‘% Comments’); ?></h5>

<?php wp_list_comments( array(‘callback’ => ‘pp_comment’, ‘avatar_size’ => ’40’) ); ?>

<!– End of thread –>
<br class=”clear”/>

<?php endif; ?>

<?php if ( get_comment_pages_count() > 1 && get_option( ‘page_comments’ ) ) : // Are there comments to navigate through? ?>

<div class=”pagination”><p><?php previous_comments_link(); ?> <?php next_comments_link(); ?></p></div><br class=”clear”/><div class=”line”></div>

<?php endif; // check for comment navigation ?>

<?php
//Display Comment Form
if (‘open’ == $post->comment_status) : ?>

<div id=”respond”>
<?php comment_form(); ?>
</div>

<?php endif; ?>