Go, Revel: Stop server-side fan-out

My local tests indicated that the fan-out was not helpful.  In fact, the only time the fan-out is done is during the 256-concurrency tests, where there is *already* client-side fan-out.  Intuitively, what's the point, unless MySQL can effectively process > 256 transactions in parallel? 

(My only concern is that I didn't test this on EC2, only locally with client, server, MySQL on the same workstation.)