How to make sidebars appears empty?

[lindebjerg]

How much code must I erase in sidebar_left.php and sidebar_right.php to make the sidebars appears empty until I make a content by widgets?

Theme Streamline 3.0

<?php //begin l_sidebar  ?>

<div id="l_sidebar">

	<ul id="l_sidebarwidgeted">
	
	<?php if ( !function_exists('dynamic_sidebar') || !dynamic_sidebar('Sidebar Bottom Left') ) : ?>
	
		<li id="categories" class="widget">
            <h4><?php _e("Categories", 'studiopress'); ?></h4>
                <ul>
                    <?php wp_list_categories('orderby=name&title_li=&depth=2'); ?>[/list]		
	
		<li id="archives" class="widget">
            <h4><?php _e("Archives", 'studiopress'); ?></h4>
                <ul>
                    <?php wp_get_archives('type=monthly'); ?>[/list]		
		
	<?php endif; ?>
	
	[/list]	
</div>

<?php //end l_sidebar  ?>