minor #22989 [Cache] Remove extra arg in call to TraceableAdapter::st…

…art() (chalasr)

This PR was merged into the 3.3 branch.

Discussion
----------

[Cache] Remove extra arg in call to TraceableAdapter::start()

| Q             | A
| ------------- | ---
| Branch?       | 3.3
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Leftover from previous implementation

Commits
-------

a379319 Remove extra arg in call to TraceableAdapter::start()

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

@@ -107,7 +107,7 @@ public function saveDeferred(CacheItemInterface $item)
      */
     public function getItems(array $keys = array())
     {
-        $event = $this->start(__FUNCTION__, $keys);
+        $event = $this->start(__FUNCTION__);
         try {
             $result = $this->pool->getItems($keys);
         } finally {