chore(datasets): don't require coverage for import

kedro-datasets/kedro_datasets/__init__.py

@@ -9,7 +9,7 @@
 try:
     # Custom `KedroDeprecationWarning` class was added in Kedro 0.18.14.
     from kedro import KedroDeprecationWarning
-except ImportError:
+except ImportError:  # pragma: no cover
 
     class KedroDeprecationWarning(DeprecationWarning):
         """Custom class for warnings about deprecated Kedro features."""