Remove skip condition as neither HHVM nor PHPDBG are supported

Author: sebastianbergmann

tests/end-to-end/regression/1348.phpt

@@ -2,11 +2,6 @@
 https://github.com/sebastianbergmann/phpunit/issues/1348
 --XFAIL--
 https://github.com/sebastianbergmann/phpunit/issues/5356
---SKIPIF--
-<?php declare(strict_types=1);
-if (defined('HHVM_VERSION') || defined('PHPDBG_VERSION')) {
-    print 'skip: PHP runtime required';
-}
 --FILE--
 <?php declare(strict_types=1);
 $_SERVER['argv'][] = '--do-not-cache-result';