Drop unused variable in FFT wrapper test (#2114)
Drop unused variable in FFT wrapper test (#2114)

Drops an unused assigned variable from the FFT wrapper tests.
mraspaud/dask,blaze/dask,mrocklin/dask,mrocklin/dask,ContinuumIO/dask,jakirkham/dask,mraspaud/dask,ContinuumIO/dask,dask/dask,jakirkham/dask,blaze/dask,dask/dask,jcrist/dask,cpcloud/dask,jcrist/dask