MDL-20698 cleaning up old ugprade hacks in setup.php

lib/setup.php

@@ -427,16 +427,6 @@ if (!empty($CFG->cachetype)) {
     $CFG->rcache    = false;
 }
 
-// Set a default enrolment configuration (see bug 1598)
-if (!isset($CFG->enrol)) {
-    $CFG->enrol = 'manual';
-}
-
-// Set default enabled enrolment plugins
-if (!isset($CFG->enrol_plugins_enabled)) {
-    $CFG->enrol_plugins_enabled = 'manual';
-}
-
 // File permissions on created directories in the $CFG->dataroot
 if (empty($CFG->directorypermissions)) {
     $CFG->directorypermissions = 0777;      // Must be octal (that's why it's here)