Fix some lint errors (#744)

Author: dandavison

temporalio/worker/_workflow.py

@@ -180,7 +180,7 @@ async def run(self) -> None:
 
     def notify_shutdown(self) -> None:
         if self._could_not_evict_count:
-            logger.warn(
+            logger.warning(
                 f"Shutting down workflow worker, but {self._could_not_evict_count} "
                 + "workflow(s) could not be evicted previously, so the shutdown will hang"
             )
@@ -244,7 +244,9 @@ async def _handle_activation(
                 self._running_workflows[act.run_id] = workflow
             elif init_job:
                 # This should never happen
-                logger.warn("Cache already exists for activation with initialize job")
+                logger.warning(
+                    "Cache already exists for activation with initialize job"
+                )
 
             # Run activation in separate thread so we can check if it's
             # deadlocked

tests/helpers/__init__.py

@@ -4,7 +4,7 @@
 import uuid
 from contextlib import closing
 from datetime import timedelta
-from typing import Any, Awaitable, Callable, Optional, Sequence, Type, TypeVar
+from typing import Awaitable, Callable, Optional, Sequence, Type, TypeVar
 
 from temporalio.api.common.v1 import WorkflowExecution
 from temporalio.api.enums.v1 import IndexedValueType