[5.3] Update deleted files in script.php for the upcoming 5.3.0-beta1 (joomla#44838)

* Add deleted files from PR joomla#44812
* Add deleted file from PR joomla#44752
* Add deleted file from PR joomla#44819

Author: richard67

administrator/components/com_admin/script.php

@@ -2369,6 +2369,10 @@ public function deleteUnexistingFiles($dryRun = false, $suppressOutput = false)
             '/media/system/css/system-site-offline_rtl.min.css.gz',
             '/media/system/scss/system-site-offline_rtl.scss',
             // From 5.3.0-alpha3 to 5.3.0-beta1
+            '/administrator/modules/mod_feed/mod_feed.php',
+            '/administrator/modules/mod_privacy_status/mod_privacy_status.php',
+            '/libraries/vendor/guzzlehttp/promises/src/functions.php',
+            '/libraries/vendor/guzzlehttp/promises/src/functions_include.php',
             '/libraries/vendor/maximebf/debugbar/LICENSE',
             '/libraries/vendor/maximebf/debugbar/src/DebugBar/Bridge/CacheCacheCollector.php',
             '/libraries/vendor/maximebf/debugbar/src/DebugBar/Bridge/DoctrineCollector.php',