fix lint errors

langfuse/client.py

@@ -11,7 +11,6 @@
 import tracemalloc
 from typing import (
     Any,
-    Callable,
     Dict,
     Optional,
     Literal,

langfuse/task_manager.py

@@ -7,7 +7,7 @@
 import threading
 from queue import Empty, Queue
 import time
-from typing import Callable, List, Any, Optional
+from typing import List, Any, Optional
 import typing
 
 from langfuse.Sampler import Sampler

langfuse/utils/langfuse_singleton.py

@@ -1,6 +1,6 @@
 import httpx
 import threading
-from typing import Callable, Optional
+from typing import Optional
 
 
 from langfuse import Langfuse

tests/test_task_manager.py

@@ -1,4 +1,3 @@
-from unittest.mock import Mock, ANY
 import logging
 import subprocess
 import threading