Remove defensive fallback

Signed-off-by: Jeffrey Wang <jeffreywang@anyscale.com>

Author: jeffreywang-anyscale

python/ray/serve/_private/router.py

@@ -1756,7 +1756,7 @@ def _wrap_asyncio_call_in_future(
             A concurrent.futures.Future that resolves to the ReplicaResult.
         """
         # Extract operation name from coroutine for logging
-        operation_name = coro.__name__ if hasattr(coro, "__name__") else "operation"
+        operation_name = coro.__name__
 
         def asyncio_future_callback(
             asyncio_future: asyncio.Future, concurrent_future: concurrent.futures.Future