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

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

virtualizarr/tests/test_writers/test_zarr.py

@@ -5,7 +5,6 @@
 
 from virtualizarr import open_virtual_dataset
 from virtualizarr.backend import FileType
-from virtualizarr.manifests.manifest import ChunkManifest
 from virtualizarr.readers.zarr_v3 import metadata_from_zarr_json
 from virtualizarr.writers.zarr import dataset_to_zarr