Clean up whitespace in util.py

Remove unnecessary blank line in util.py

Author: blankirigaya

malariagen_data/util.py

@@ -489,7 +489,7 @@ def _init_filesystem(url, **kwargs):
 
     # Process the URL using fsspec.
     fs, path = url_to_fs(url, **storage_options)
-    
+
     # Path compatibility, fsspec/gcsfs behaviour varies between versions.
     while path.endswith("/"):
         path = path[:-1]