[Perf] Optimize `_update_states` for GPU model runner (#16910)

Signed-off-by: snowcharm <snowcharmqq@gmail.com>

vllm/v1/worker/gpu_model_runner.py

@@ -454,7 +454,7 @@ class GPUModelRunner(LoRAModelRunnerMixin):
 
         # Add the new or resumed requests to the persistent batch.
         # The smaller empty indices are filled first.
-        removed_req_indices = sorted(removed_req_indices, reverse=True)
+        removed_req_indices.sort(reverse=True)
         for req_id in req_ids_to_add:
             req_state = self.requests[req_id]
             if removed_req_indices: