Remove the PHPStan polyfill for OCI_NO_AUTO_COMMIT

The polyfill would cause a PSR1.Files.SideEffects.FoundWithSymbols warning.

phpstan.neon.dist

@@ -2,8 +2,6 @@ parameters:
     level: 7
     paths:
         - %currentWorkingDirectory%/lib
-    scanFiles:
-        - %currentWorkingDirectory%/tests/phpstan-polyfill.php
     reportUnmatchedIgnoredErrors: false
     checkMissingIterableValueType: false
     checkGenericClassInNonGenericObjectType: false

tests/phpstan-polyfill.php

-<?php
-
-declare(strict_types=1);
-
-// PHPStan does not read global constants from the stubs yet, remove this when it does
-if (defined('OCI_NO_AUTO_COMMIT')) {
-    return;
-}
-
-define('OCI_NO_AUTO_COMMIT', 0);