inline variable

no need to create the temporary `$ipAddress` variable, we can access the array offset directly from the function.

Author: browner12

src/Symfony/Component/HttpFoundation/Request.php

@@ -750,9 +750,7 @@ public function getClientIps(): array
      */
     public function getClientIp(): ?string
     {
-        $ipAddresses = $this->getClientIps();
-
-        return $ipAddresses[0];
+        return $this->getClientIps()[0];
     }
 
     /**