Index: wp-includes/class-wp-atom-server.php
===================================================================
--- wp-includes/class-wp-atom-server.php	(revision 21549)
+++ wp-includes/class-wp-atom-server.php	(working copy)
@@ -963,9 +963,6 @@
 
 		$this->ENTRY_PATH = $post_type;
 
-		if (!isset($page)) {
-			$page = 1;
-		}
 		$page = (int) $page;
 
 		$count = get_option('posts_per_rss');