remove unneeded import

Signed-off-by: Bernd Verst <github@bernd.dev>

ext/dapr-ext-fastapi/dapr/ext/fastapi/actor.py

@@ -13,7 +13,7 @@
 limitations under the License.
 """
 
-from typing import Any, Optional, Type, List, Callable
+from typing import Any, Optional, Type, List
 
 from fastapi import FastAPI, APIRouter, Request, Response, status  # type: ignore
 from fastapi.logger import logger