minor symfony#57607 [AssetMapper] Remove unreachable code line (smnandre)

This PR was merged into the 7.2 branch.

Discussion
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[AssetMapper] Remove unreachable code line

| Q             | A
| ------------- | ---
| Branch?       | 7.2 for features
| Bug fix?      |  no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Issues        | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exists, explain below instead -->
| License       | MIT

Felt on this while trying to debug this FS thing..

Commits
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c866bf3 [AssetMapper] Remove unreachable code line

Author: nicolas-grekas

src/Symfony/Component/AssetMapper/Tests/ImportMap/RemotePackageStorageTest.php

@@ -52,8 +52,6 @@ public function testSaveThrowsWhenVendorDirectoryIsNotWritable()
         $this->expectException(\RuntimeException::class);
         $this->expectExceptionMessage('file_put_contents('.$vendorDir.'/module_specifier/module_specifier.index.js): Failed to open stream: No such file or directory');
         $storage->save($entry, 'any content');
-
-        $this->filesystem->remove($vendorDir);
     }
 
     public function testIsDownloaded()