Depend on class autoloading

Test Plan:
Run setup.
/differential/

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Koolvin

Maniphest Tasks: T1103

Differential Revision: https://secure.phabricator.com/D2612

scripts/util/purge_cache.php

@@ -20,9 +20,6 @@
 $root = dirname(dirname(dirname(__FILE__)));
 require_once $root.'/scripts/__init_script__.php';
 
-phutil_require_module('phutil', 'console');
-phutil_require_module('phabricator', 'storage/queryfx');
-
 $purge_changesets   = false;
 $purge_differential = false;
 $purge_maniphest    = false;