fix typing lint errors

Author: VegetarianOrc

temporalio/contrib/opentelemetry.py

@@ -649,7 +649,7 @@ def __init__(
             success_is_complete: bool,
         ):
             self._ctx = contextvars.copy_context()
-            self._token = None
+            self._token: Optional[contextvars.Token] = None
             self._owner = interceptor
             self._success_is_complete = success_is_complete
 
@@ -662,7 +662,7 @@ def __exit__(
             exc_type: Optional[type[BaseException]],
             exc_value: Optional[BaseException],
             traceback: Optional[TracebackType],  # noqa: F811
-        ) -> bool | None:
+        ):
             self._ctx.run(self._end, exc_type, exc_value, traceback)
 
         def _start(self):

temporalio/worker/_workflow.py

@@ -337,9 +337,6 @@ async def _handle_activation(
                 raise deadlock_exc from None
 
         except Exception as err:
-            if isinstance(err, GeneratorExit):
-                print("###############generator exit#############")
-
             if isinstance(err, _DeadlockError):
                 err.swap_traceback()