bug #18629 [Cache] fix expiration handling in ArrayAdapter (xabbuh)

This PR was merged into the 3.1-dev branch.

Discussion
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[Cache] fix expiration handling in ArrayAdapter

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

Commits
-------

8b0d990 [Cache] fix expiration handling in ArrayAdapter

src/Symfony/Component/Cache/Adapter/ArrayAdapter.php

@@ -137,6 +137,8 @@ class ArrayAdapter implements AdapterInterface, LoggerAwareInterface
         $expiry = $item[CacheItem::CAST_PREFIX.'expiry'];
 
         if (null !== $expiry && $expiry <= time()) {
+            $this->deleteItem($key);
+
             return true;
         }
         if ($this->storeSerialized) {