Remove redundant database objects

This reduces database connections and improves performance.

core/domains/app_defaults.php

@@ -30,7 +30,6 @@
 		//set domains with enabled status of empty or null to true
 			$sql = "update v_domains set domain_enabled = 'true' ";
 			$sql .= "where domain_enabled = '' or domain_enabled is null ";
-			$database = new database;
 			$database->execute($sql, null);
 			unset($sql);