[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

xarray/tests/test_async.py

@@ -11,7 +11,6 @@
 import xarray.testing as xrt
 from xarray.tests import has_zarr_v3, requires_zarr_v3
 
-
 if has_zarr_v3:
     import zarr
     from zarr.abc.store import ByteRequest, Store