Removed raise exception

Author: gkevinzheng

google/cloud/bigtable/admin_v2/overlay/types/consistency.py

@@ -89,7 +89,6 @@ def done(self, retry: OptionalRetry = None):
             return check_consistency_response.consistent
         except Exception as e:
             self.set_exception(e)
-            raise e
 
     def cancel(self):
         raise NotImplementedError("Cannot cancel consistency token operation")