Index: wp-includes/user.php
===================================================================
--- wp-includes/user.php	(revision 13644)
+++ wp-includes/user.php	(working copy)
@@ -280,6 +280,29 @@
 }
 
 /**
+ * Delete user option with global blog capability.
+ *
+ * User options are just like user metadata except that they have support for
+ * global blog options. If the 'global' parameter is false, which it is by default
+ * it will prepend the WordPress table prefix to the option name.
+ *
+ * @since 3.0.0
+ * @uses $wpdb WordPress database object for queries
+ *
+ * @param int $user_id User ID
+ * @param string $option_name User option name.
+ * @param bool $global Optional. Whether option name is blog specific.
+ * @return unknown
+ */
+function delete_user_option( $user_id, $option_name, $global = false ) {
+	global $wpdb;
+
+	if ( !$global )
+		$option_name = $wpdb->prefix . $option_name;
+	return delete_user_meta( $user_id, $option_name );
+}
+
+/**
  * Get users for the blog.
  *
  * For setups that use the multi-blog feature. Can be used outside of the