Remove modules.
Remove modules.

These are not used by Riak Control at all, and won't be in the
foreceeable future.

elkingtonmcb/riak,amyvmiwei/riak,laurenrother/riak,biddyweb/riak,DavidAlphaFox/riak,glickbot/riak,basho/riak,authbox-lib/riak,GabrielNicolasAvellaneda/riak,yangchengjian/riak