mysqli_next_result_no_repeat_error.phpt must not use --EXTENSIONS--

This is only properly supported as of PHP 8.1.0[1], and may cause
spurious test failures for older versions[2].

[1] <#6787>
[2] <https://ci.appveyor.com/project/php/php-src/builds/42044075/job/tk4138s43p1953hx>

ext/mysqli/tests/mysqli_next_result_no_repeat_error.phpt

@@ -1,9 +1,8 @@
 --TEST--
 next_result reports errors from previous calls
---EXTENSIONS--
-mysqli
 --SKIPIF--
 <?php
+require_once 'skipif.inc';
 require_once 'skipifconnectfailure.inc';
 ?>
 --FILE--