Remove always true/false occurrences

Author: alexandre-daubois

Request.php

@@ -1536,7 +1536,7 @@ public function getPreferredLanguage(?array $locales = null): ?string
             return $preferredLanguages[0] ?? null;
         }
 
-        $locales = array_map($this->formatLocale(...), $locales ?? []);
+        $locales = array_map($this->formatLocale(...), $locales);
         if (!$preferredLanguages) {
             return $locales[0];
         }