remove extra lamda
remove extra lamda

pombredanne/dask,blaze/dask,cowlicks/dask,dask/dask,ContinuumIO/dask,dask/dask,jakirkham/dask,mrocklin/dask,jcrist/dask,pombredanne/dask,jcrist/dask,mrocklin/dask,vikhyat/dask,cpcloud/dask,chrisbarber/dask,vikhyat/dask,jakirkham/dask,blaze/dask,mikegraham/dask,PhE/dask,gameduell/dask,mraspaud/dask,mraspaud/dask,PhE/dask,ContinuumIO/dask