Refs Elgg#4487. Turning off system log (even more) during upgrades. R…

…emoved debug call to system_log() in create_annotation().

engine/lib/annotations.php

@@ -95,8 +95,6 @@ function create_annotation($entity_guid, $name, $value, $value_type = '',
 	$entity = get_entity($entity_guid);
 
 	if (elgg_trigger_event('annotate', $entity->type, $entity)) {
-		system_log($entity, 'annotate');
-
 		// If ok then add it
 		$result = insert_data("INSERT into {$CONFIG->dbprefix}annotations
 			(entity_guid, name_id, value_id, value_type, owner_guid, time_created, access_id) VALUES

upgrade.php

@@ -20,7 +20,8 @@
 require_once(dirname(__FILE__) . "/engine/start.php");
 
 if (get_input('upgrade') == 'upgrade') {
-	// disable the core system log for upgrades to avoid exceptions when the schema changes.
+	// disable the system log for upgrades to avoid exceptions when the schema changes.
+	elgg_unregister_event_handler('log', 'systemlog', 'system_log_default_logger');
 	elgg_unregister_event_handler('all', 'all', 'system_log_listener');
 
 	if (elgg_get_unprocessed_upgrades()) {