Index: wp-includes/post.php
===================================================================
--- wp-includes/post.php	(revision 15144)
+++ wp-includes/post.php	(working copy)
@@ -1724,8 +1724,6 @@
 	if ( $post->post_type == 'attachment' )
 		return wp_delete_attachment( $postid, $force_delete );
 
-	do_action('delete_post', $postid);
-
 	delete_post_meta($postid,'_wp_trash_meta_status');
 	delete_post_meta($postid,'_wp_trash_meta_time');