Deprecate sticky_class() in favor of post_class(). props solarissmoke, fixes #16675.

git-svn-id: https://develop.svn.wordpress.org/trunk@21253 602fd350-edb4-49c9-b593-d223f7449a82

wp-includes/post-template.php

@@ -572,20 +572,6 @@ function post_password_required( $post = null ) {
 	return ! $wp_hasher->CheckPassword( $post->post_password, $hash );
 }
 
-/**
- * Display "sticky" CSS class, if a post is sticky.
- *
- * @since 2.7.0
- *
- * @param int $post_id An optional post ID.
- */
-function sticky_class( $post_id = null ) {
-	if ( !is_sticky($post_id) )
-		return;
-
-	echo " sticky";
-}
-
 /**
  * Page Template Functions for usage in Themes
  *