minor #51733 [Validator] remove an unreachable code branch (xabbuh)

This PR was merged into the 6.4 branch.

Discussion
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[Validator] remove an unreachable code branch

| Q             | A
| ------------- | ---
| Branch?       | 6.3
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       |
| License       | MIT
| Doc PR        |

This property is a string or null but can never be `false`.

Commits
-------

4e81865162 remove an unreachable code branch

Author: nicolas-grekas

Context/ExecutionContext.php

@@ -142,7 +142,7 @@ public function setConstraint(Constraint $constraint): void
     public function addViolation(string $message, array $parameters = []): void
     {
         $this->violations->add(new ConstraintViolation(
-            false === $this->translationDomain ? strtr($message, $parameters) : $this->translator->trans($message, $parameters, $this->translationDomain),
+            $this->translator->trans($message, $parameters, $this->translationDomain),
             $message,
             $parameters,
             $this->root,