Customize 404 error Page to remove popular and comments

Hey!

Please add this in the functions.php file:

	class avia_combo_widget extends WP_Widget {

		function __construct() {
			//Constructor
			$widget_ops = array('classname' => 'avia_combo_widget', 'description' => 'A widget that displays your popular posts, recent posts, recent comments and a tagcloud' );
			parent::__construct( 'avia_combo_widget', THEMENAME.' Combo Widget', $widget_ops );
		}

		function widget($args, $instance)
		{
			// prints the widget

			extract($args, EXTR_SKIP);
			$posts = empty($instance['count']) ? 4 : $instance['count'];

			echo $before_widget;
			echo "<div class='tabcontainer border_tabs top_tab tab_initial_open tab_initial_open__1'>";
			if(!is_404()) {
			echo '<div class="tab widget_tab_popular"><span>'.__('Popular', 'avia_framework').'</span></div>';
			echo "<div class='tab_content'>";
			avia_get_post_list('cat=&orderby=comment_count&posts_per_page='.$posts);
			echo "</div>";
			}

			echo '<div class="tab widget_tab_recent first_tab active_tab"><span>'.__('Recent', 'avia_framework').'</span></div>';
			echo "<div class='tab_content'>";
			avia_get_post_list('showposts='. $posts .'&orderby=post_date&order=desc');
			echo "</div>";
			
			if(!is_404()) {
			echo '<div class="tab widget_tab_comments"><span>'.__('Comments', 'avia_framework').'</span></div>';
			echo "<div class='tab_content active_tab_content'>";
			avia_get_comment_list( array('number' => $posts, 'status' => 'approve', 'order' => 'DESC') );
			echo "</div>";
			}
			
			echo '<div class="tab last_tab widget_tab_tags"><span>'.__('Tags', 'avia_framework').'</span></div>';
			echo "<div class='tab_content tagcloud'>";
			wp_tag_cloud('smallest=12&largest=12&unit=px');
			echo "</div>";

			echo "</div>";
			echo $after_widget;
		}

		function update($new_instance, $old_instance)
		{
			$instance = $old_instance;
			foreach($new_instance as $key=>$value)
			{
				$instance[$key]	= strip_tags($new_instance[$key]);
			}

			return $instance;
		}

		function form($instance) {
			//widgetform in backend

			$instance = wp_parse_args( (array) $instance, array('count' => 4) );
			if(!is_numeric($instance['count'])) $instance['count'] = 4;

	?>
			<p>
			<label for="<?php echo $this->get_field_id('count'); ?>">Number of posts you want to display:
			<input class="widefat" id="<?php echo $this->get_field_id('count'); ?>" name="<?php echo $this->get_field_name('count'); ?>" type="text" value="<?php echo esc_attr($instance['count']); ?>" /></label></p>

		<?php
		}
	}	

Regards,
Ismael