minor #57868 Remove useless code (alexandre-daubois)

This PR was merged into the 7.2 branch.

Discussion
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Remove useless code

| Q             | A
| ------------- | ---
| Branch?       | 7.2
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        | -
| License       | MIT

I went through the remaining components and bundles, following my last PRs of this kind.

Commits
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58941cec67 Remove useless code

Author: nicolas-grekas

User/InMemoryUser.php

@@ -88,8 +88,8 @@ public function isEqualTo(UserInterface $user): bool
             return false;
         }
 
-        $currentRoles = array_map('strval', (array) $this->getRoles());
-        $newRoles = array_map('strval', (array) $user->getRoles());
+        $currentRoles = array_map('strval', $this->getRoles());
+        $newRoles = array_map('strval', $user->getRoles());
         $rolesChanged = \count($currentRoles) !== \count($newRoles) || \count($currentRoles) !== \count(array_intersect($currentRoles, $newRoles));
         if ($rolesChanged) {
             return false;