Gallery Theme remove bottom nav

gistfile1.php

// add custom WP 3.0 menus
function gallery_navigation() {

	global $post;

	if ( !is_single() ) : ?>

			<div id="nav-below" class="navigation">

                <?php if(function_exists('wp_pagenavi')):
					wp_pagenavi();
                else : ?>

				<div class="nav-previous"><?php next_posts_link(__('<span class="meta-nav">&laquo;</span> Older posts', 'thematic')) ?></div>
				<div class="nav-next"><?php previous_posts_link(__('Newer posts <span class="meta-nav">&raquo;</span>', 'thematic')) ?></div>

				<?php endif; ?>
			</div>

	<?php else:
	endif;
}

add_action('gallery_navigation_below', 'gallery_navigation');