Don't include superfluous tasks in dask.
Don't include superfluous tasks in dask.

dask/dask,clarkfitzg/dask,ssanderson/dask,ContinuumIO/dask,minrk/dask,esc/dask,minrk/dask,clarkfitzg/dask,chrisbarber/dask,jakirkham/dask,jayhetee/dask,mraspaud/dask,mrocklin/dask,freeman-lab/dask,vikhyat/dask,wiso/dask,ContinuumIO/dask,cowlicks/dask,pombredanne/dask,marianotepper/dask,gameduell/dask,jakirkham/dask,hainm/dask,jayhetee/dask,ssanderson/dask,PhE/dask,simudream/dask,mikegraham/dask,esc/dask,simudream/dask,blaze/dask,wiso/dask,pombredanne/dask,blaze/dask,jcrist/dask,jcrist/dask,mrocklin/dask,PhE/dask,freeman-lab/dask,mraspaud/dask,hainm/dask,dask/dask,vikhyat/dask,cpcloud/dask,marianotepper/dask