Remove unnecessary tests for mysql2date extension (#192)

Author: IanDelMar

tests/data/mysql2date.php

@@ -19,7 +19,3 @@
 assertType('mixed', $_GET['foo']);
 assertType('int|string|false', mysql2date($_GET['foo'], $time));
 assertType('int|string|false', mysql2date(get_option('date_format'), $time));
-
-// Unsupported types
-assertType('int|string|false', mysql2date(new stdClass(), $time));
-assertType('int|string|false', mysql2date(false, $time));