[EventHubs] remove unused import (Azure#21949)

Author: yunhaoling

sdk/eventhub/azure-eventhub/azure/eventhub/_eventprocessor/in_memory_checkpoint_store.py

@@ -2,7 +2,7 @@
 # Copyright (c) Microsoft Corporation. All rights reserved.
 # Licensed under the MIT License. See License.txt in the project root for license information.
 # -----------------------------------------------------------------------------------
-from typing import List, Dict, Any, Iterable, Optional, Union
+from typing import Dict, Any, Iterable, Optional, Union
 import time
 import uuid
 import logging

sdk/eventhub/azure-eventhub/azure/eventhub/_utils.py

@@ -10,7 +10,7 @@
 import datetime
 import calendar
 import logging
-from typing import TYPE_CHECKING, Type, Optional, Dict, Union, Any, Iterable, Tuple, List, Mapping
+from typing import TYPE_CHECKING, Type, Optional, Dict, Union, Any, Iterable, Tuple, Mapping
 
 import six