Update ext/dapr-ext-workflow/dapr/ext/workflow/dapr_workflow_client.py

Co-authored-by: Elena Kolevska <elena-kolevska@users.noreply.github.com>
Signed-off-by: Fabian Martinez <46371672+famarting@users.noreply.github.com>

Author: famarting

ext/dapr-ext-workflow/dapr/ext/workflow/dapr_workflow_client.py

@@ -15,7 +15,7 @@
 
 from __future__ import annotations
 from datetime import datetime
-from typing import Any, Optional, TypeVar, Union
+from typing import Any, Optional, TypeVar
 
 
 from durabletask import client