Relay: Fix Extraneous RelayRenderer Instance Variables
Relay: Fix Extraneous RelayRenderer Instance Variables

Summary: I accidentally left these in `RelayRenderer` when I pulled out the rendering logic into `RelayReadyStateRenderer`. This just cleans up the remaining extraneous instance variables.

Reviewed By: josephsavona

Differential Revision: D3069931

fb-gh-sync-id: 3eb389a4871676e11012f3194b7787757337febf
shipit-source-id: 3eb389a4871676e11012f3194b7787757337febf

yungsters/relay,iamchenxin/relay,benjaminogles/relay,xuorig/relay,wincent/relay,iamchenxin/relay,voideanvalue/relay,NevilleS/relay,chentsulin/relay,facebook/relay,zpao/relay,rosskevin/relay,josephsavona/relay,zpao/relay,gabelevi/relay,mroch/relay,cesarandreu/relay,chirag04/relay,gabelevi/relay,mroch/relay,yungsters/relay,apalm/relay,facebook/relay,mroch/relay,atxwebs/relay,yungsters/relay,wincent/relay,benjaminogles/relay,chirag04/relay,josephsavona/relay,gabelevi/relay,xuorig/relay,kassens/relay,wincent/relay,kassens/relay,cpojer/relay,atxwebs/relay,dbslone/relay,apalm/relay,apalm/relay,kassens/relay,iamchenxin/relay,facebook/relay,wincent/relay,cesarandreu/relay,josephsavona/relay,xuorig/relay,NevilleS/relay,cesarandreu/relay,cpojer/relay,voideanvalue/relay,voideanvalue/relay,chirag04/relay,iamchenxin/relay,cpojer/relay,freiksenet/relay,facebook/relay,kassens/relay,voideanvalue/relay,cpojer/relay,kassens/relay,zpao/relay,xuorig/relay,voideanvalue/relay,freiksenet/relay,xuorig/relay,facebook/relay,chentsulin/relay,facebook/relay,chentsulin/relay,xuorig/relay,freiksenet/relay,rosskevin/relay,kassens/relay,atxwebs/relay,wincent/relay,voideanvalue/relay,wincent/relay,NevilleS/relay,dbslone/relay,benjaminogles/relay,atxwebs/relay