Remove read_csv and read_text functions (#538)
Remove read_csv and read_text functions (#538)

This were moved a long time ago.  We're now just finishing the
deprecation.
blaze/distributed,broxtronix/distributed,broxtronix/distributed,dask/distributed,broxtronix/distributed,dask/distributed,dask/distributed,dask/distributed,blaze/distributed,mrocklin/distributed,mrocklin/distributed,mrocklin/distributed