Fix style.

dulwich/cloud/gcs.py

@@ -21,7 +21,6 @@
 
 """Storage of repositories on GCS."""
 
-from io import BytesIO
 import posixpath
 import tempfile
 

dulwich/object_store.py

@@ -1526,6 +1526,7 @@ class BucketBasedObjectStore(PackBasedObjectStore):
         import tempfile
 
         pf = tempfile.SpooledTemporaryFile()
+
         def commit():
             if pf.tell() == 0:
                 pf.close()