Revert "Add  array to Queue::push for Iron.io jobs.  Allows for params to be passed in such as 'timeout' and 'expires_in'. The 'timeout' option fixes an issue for jobs running longer than the default 60 seconds. They timeout and get submitted again, which causes multiple jobs to run."

This reverts commit 1e216e1d6f30e341c0c99cf4b9b004620337fb00.