Revert "CI: Fix black dependency issue (#5716)" (#5717)
Revert "CI: Fix black dependency issue (#5716)" (#5717)

This reverts commit 2cabf4f04f67a2ddef45d4fbede688a1d24fd97a.
ContinuumIO/dask,blaze/dask,mrocklin/dask,jakirkham/dask,dask/dask,jakirkham/dask,dask/dask,mrocklin/dask,blaze/dask,ContinuumIO/dask