Fix linter errors: remove extra blank line and unused import

Author: cgillum

azure/durable_functions/models/DurableOrchestrationClient.py

@@ -111,7 +111,6 @@ async def start_new(self,
             ex_message: Any = response[1]
             raise Exception(ex_message)
 
-
     def create_check_status_response(
             self, request: func.HttpRequest, instance_id: str) -> func.HttpResponse:
         """Create a HttpResponse that contains useful information for \

azure/durable_functions/models/utils/http_utils.py

@@ -1,4 +1,4 @@
-from typing import Any, List, Union, Optional
+from typing import Any, List, Union
 
 import aiohttp