minor #49341 [Filesystem] Remove always true condition (alamirault)

This PR was merged into the 6.3 branch.

Discussion
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[Filesystem] Remove always true condition

| Q             | A
| ------------- | ---
| Branch?       | 6.3
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tickets       | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exists, explain below instead -->
| License       | MIT
| Doc PR        | symfony/symfony-docs#... <!-- required for new features -->

`$mode` is type hinted `int $mode`, so this condition is always true.

Commits
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d2cf15d1ff [Filesystem] Remove always true condition

Author: nicolas-grekas

Filesystem.php

@@ -218,7 +218,7 @@ private static function doRemove(array $files, bool $isRecursive): void
     public function chmod(string|iterable $files, int $mode, int $umask = 0000, bool $recursive = false)
     {
         foreach ($this->toIterable($files) as $file) {
-            if (\is_int($mode) && !self::box('chmod', $file, $mode & ~$umask)) {
+            if (!self::box('chmod', $file, $mode & ~$umask)) {
                 throw new IOException(sprintf('Failed to chmod file "%s": ', $file).self::$lastError, 0, null, $file);
             }
             if ($recursive && is_dir($file) && !is_link($file)) {