Bug 1765264: Group id not needed to be array for group_get_admin_ids()

A mistake made in the patch for Bug 1367539

behatnotneeded

Change-Id: If0b27c356887483532693153f0b8936b7d12eb14
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>

htdocs/artefact/file/lib.php

@@ -1966,7 +1966,7 @@ class ArtefactTypeFile extends ArtefactTypeFileBase {
         safe_require('notification', 'internal');
         foreach ($groups as $group) {
             // find the group admins and notify them - there should be at least 1 admin for a group
-            if ($admins = group_get_admin_ids(array($group->id))) {
+            if ($admins = group_get_admin_ids($group->id)) {
                 $data = array(
                     'subject'   => get_string('adm_group_notificationsubject', 'artefact.file'),
                     'message'   => get_string('adm_group_notificationmessage', 'artefact.file', $group->name, ceil((int)$group->quotausedpercent), display_size($group->quota)),