minor symfony#24528 [Translation] minor: remove unused variable in test (dunglas)

This PR was merged into the 2.7 branch.

Discussion
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[Translation] minor: remove unused variable in test

| Q             | A
| ------------- | ---
| Branch?       | 2.7
| Bug fix?      | no
| New feature?  | no <!-- don't forget to update src/**/CHANGELOG.md files -->
| BC breaks?    | no
| Deprecations? | no <!-- don't forget to update UPGRADE-*.md files -->
| Tests pass?   | yes
| Fixed tickets | #... <!-- #-prefixed issue number(s), if any -->
| License       | MIT
| Doc PR        | n/a

Commits
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c6ed0e4 [Translation] minor: remove unused variable in test

Author: nicolas-grekas

src/Symfony/Component/Translation/Tests/TranslatorTest.php

@@ -25,7 +25,7 @@ class TranslatorTest extends TestCase
      */
     public function testConstructorInvalidLocale($locale)
     {
-        $translator = new Translator($locale, new MessageSelector());
+        new Translator($locale, new MessageSelector());
     }
 
     /**