Remove additional import

Co-authored-by: jakirkham <[email protected]>

Author: dstansby

numcodecs/tests/test_zarr3.py

@@ -9,7 +9,6 @@
     import zarr
 else:
     zarr = pytest.importorskip("zarr")
-    import zarr  # pragma: no cover
 
 import zarr.storage
 from zarr.core.common import JSON