MDL-64866 message: Remove message/defaultoutputs.php

                   and final deprecation of admin_page_defaultmessageoutputs class.

lib/adminlib.php

@@ -6732,32 +6732,6 @@ public function search($query) {
     }
 }
 
-/**
- * Default message outputs configuration
- *
- * @deprecated since Moodle 3.7 MDL-64495. Please use admin_page_managemessageoutputs instead.
- * @todo       MDL-64866 This will be deleted in Moodle 3.11.
- *
- * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-class admin_page_defaultmessageoutputs extends admin_page_managemessageoutputs {
-    /**
-     * Calls parent::__construct with specific arguments
-     *
-     * @deprecated since Moodle 3.7 MDL-64495. Please use admin_page_managemessageoutputs instead.
-     * @todo       MDL-64866 This will be deleted in Moodle 3.11.
-     */
-    public function __construct() {
-        global $CFG;
-
-        debugging('admin_page_defaultmessageoutputs class is deprecated. Please use admin_page_managemessageoutputs instead.',
-            DEBUG_DEVELOPER);
-
-        admin_externalpage::__construct('defaultmessageoutputs', get_string('defaultmessageoutputs', 'message'), new moodle_url('/message/defaultoutputs.php'));
-    }
-}
-
-
 /**
  * Manage question behaviours page
  *

lib/upgrade.txt

@@ -21,6 +21,8 @@ information provided here is intended especially for developers.
 * A new optional parameter `$sort` has been added to all `$context->get_capabilities()` methods to be able to define order of
   returned capability array.
 * Spout has been upgraded to the latest version - 3.1.0
+* The final deprecation of /message/defaultoutputs.php file and admin_page_defaultmessageoutputs.
+  All their settings moved to admin/message.php (see MDL-64495). Please use admin_page_managemessageoutputs class instead.
 
 === 3.10 ===
 * PHPUnit has been upgraded to 8.5. That comes with a few changes: