Remove unnecessary tests for current_time extension (#191)

Author: IanDelMar

tests/data/current_time.php

@@ -22,7 +22,3 @@
 // Unknown types
 assertType('int|string', current_time($_GET['foo']));
 assertType('int|string', current_time(get_option('date_format')));
-
-// Unsupported types
-assertType('int|string', current_time(new stdClass()));
-assertType('int|string', current_time(false));