TASK speedup Neos.Neos behavioral test by removing sleep(2);

Currently we run tests only in sync mode `CATCHUPTRIGGER_ENABLE_SYNCHRONOUS_OPTION=1` as the async mode is broken: neos#4612

I presume the `sleep(2)` is an artefact for the async tests to work at some earlier point.

Neos.Neos/Tests/Behavior/Features/Bootstrap/FeatureContext.php

@@ -73,9 +73,6 @@ public function resetContentRepositoryComponents(): void
      */
     public function resetPersistenceManagerAndFeedbackCollection()
     {
-        // FIXME: we have some strange race condition between the scenarios; my theory is that
-        // somehow projectors still run in the background when we start from scratch...
-        sleep(2);
         $this->getObject(\Neos\Flow\Persistence\PersistenceManagerInterface::class)->clearState();
         // FIXME: FeedbackCollection is a really ugly, hacky SINGLETON; so it needs to be RESET!
         $this->getObject(\Neos\Neos\Ui\Domain\Model\FeedbackCollection::class)->reset();