Do not set "report_memleaks" which will be deprecated in PHP 8.5

Author: sebastianbergmann

src/Runner/PhptTestCase.php

@@ -791,7 +791,6 @@ private function settings(bool $collectCoverage): array
             'open_basedir=',
             'output_buffering=Off',
             'output_handler=',
-            'report_memleaks=0',
             'report_zend_debug=0',
         ];