MS: Remove @todo for ms_protect_special_option() from delete_site_option().

This todo has been in place since the original merge of MU. At the time of merge, `wpmu_protect_special_option()` protected an empty array, and there has been no noticeable need since. As we introduce `_network_option()`, let's leave this behind. A new ticket can be opened if necessary.

See #28290.


git-svn-id: https://develop.svn.wordpress.org/trunk@34756 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/option.php

@@ -1185,8 +1185,6 @@ function add_site_option( $option, $value ) {
 function delete_site_option( $option ) {
 	global $wpdb;
 
-	// ms_protect_special_option( $option ); @todo
-
 	/**
 	 * Fires immediately before a specific site option is deleted.
 	 *