minor #54869 [HttpFoundation] inline variable (browner12)

This PR was merged into the 7.2 branch.

Discussion
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[HttpFoundation] inline variable

| Q             | A
| ------------- | ---
| Branch?       | 7.1
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Issues        | NA <!-- prefix each issue number with "Fix #", no need to create an issue if none exists, explain below instead -->
| License       | MIT

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

Commits
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26e61d2f82 inline variable

Author: fabpot

Request.php

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