Fix coverage

Author: tomwhite

sgkit/distarray.py

@@ -4,7 +4,7 @@
 cm = guess_chunkmanager(None)
 
 if cm.array_cls.__module__.split(".")[0] == "cubed":
-    from cubed import *  # noqa: F401, F403
+    from cubed import *  # pragma: no cover # noqa: F401, F403
 else:
     # default to dask
     from dask.array import *  # noqa: F401, F403