General: Remove inaccurate reference to the `link_updated` field from the `wp_insert_link()` DocBlock.

The `link_updated` field is unused as of WordPress 3.0 and was never updated via `wp_insert_link()`, only via the `wp-admin/update-links.php` file removed in [13744].

Follow-up to [13744], [49487].

Props dshanske, dharm1025, SergeyBiryukov.
Fixes #54880.
Built from https://develop.svn.wordpress.org/trunk@52659


git-svn-id: http://core.svn.wordpress.org/trunk@52248 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/bookmark.php

@@ -163,7 +163,6 @@ function get_link_to_edit( $link ) {
  *     @type string $link_visible     Optional. 'Y' means visible, anything else means not.
  *     @type int    $link_owner       Optional. A user ID.
  *     @type int    $link_rating      Optional. A rating for the link.
- *     @type string $link_updated     Optional. When the link was last updated.
  *     @type string $link_rel         Optional. A relationship of the link to you.
  *     @type string $link_notes       Optional. An extended description of or notes on the link.
  *     @type string $link_rss         Optional. A URL of an associated RSS feed.

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.0-alpha-52658';
+$wp_version = '6.0-alpha-52659';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.