Apply fixes from StyleCI

Author: StyleCIBot

src/Illuminate/Queue/Console/WorkCommand.php

@@ -2,7 +2,6 @@
 
 namespace Illuminate\Queue\Console;
 
-use Carbon\CarbonInterval;
 use Illuminate\Console\Command;
 use Illuminate\Contracts\Cache\Repository as Cache;
 use Illuminate\Contracts\Queue\Job;