clean up serde json deserializing
clean up serde json deserializing

erickt/serde,3Hren/serde,Byron/serde,Ticki/serde,infinityb/serde,pcwalton/serde,serde-rs/serde,skade/serde,jmesmon/serde,csmulhern/serde,tempbottle/serde,thorbenk/serde,sidred10/serde,Hoverbear/serde,oli-obk/rust-serde,JohnHeitmann/serde,eefriedman/serde