[consumption] Do not print Idle. It is polluting logs a lot.

fixes php-enqueue/enqueue-dev#35

Author: makasim

Consumption/QueueConsumer.php

@@ -222,8 +222,6 @@ protected function doConsume(ExtensionInterface $extension, Context $context)
 
             $extension->onPostReceived($context);
         } else {
-            $logger->debug(sprintf('Idle'));
-
             usleep($this->idleMicroseconds);
             $extension->onIdle($context);
         }