Cleanup of SLNHasher.
Cleanup of SLNHasher.

Lacra17/stronglink,yamingd/stronglink,nkatsaros/stronglink,iOSCowboy/stronglink,rmoorman/stronglink,shaunstanislaus/stronglink,btrask/stronglink,Ryezhang/stronglink,shaunstanislaus/stronglink,btrask/stronglink,btrask/stronglink,Lacra17/stronglink,guiquanz/stronglink,rmoorman/stronglink,iOSCowboy/stronglink,Lacra17/stronglink,iOSCowboy/stronglink,nkatsaros/stronglink,yamingd/stronglink,shaunstanislaus/stronglink,guiquanz/stronglink,nkatsaros/stronglink,feld/stronglink,Ryezhang/stronglink,feld/stronglink,yamingd/stronglink,rmoorman/stronglink,Ryezhang/stronglink,guiquanz/stronglink,btrask/stronglink,feld/stronglink