chore: removing outdated examples (#202)

examples/python_rs/llm/vllm/utils/prefill_queue.py

-# SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
-# SPDX-License-Identifier: Apache-2.0
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-
-from typing import Optional
-
-import msgspec
-from utils.nats_queue import NATSQueue
-from vllm.remote_prefill import RemotePrefillRequest
-
-
-class PrefillQueue(NATSQueue):
-    """
-    A wrapper of NATSQueue for PrefillRequest.
-    The stream name is forced to be "prefill_queue".
-    """
-
-    def __init__(
-        self,
-        stream_name="prefill_queue",
-        nats_server: str = "nats://localhost:4222",
-        dequeue_timeout: float = 1,
-    ):
-        super().__init__(
-            stream_name=stream_name,
-            nats_server=nats_server,
-            dequeue_timeout=dequeue_timeout,
-        )
-
-    async def enqueue_prefill_request(
-        self, prefill_request: RemotePrefillRequest
-    ) -> None:
-        encoded_request = msgspec.json.encode(prefill_request)
-        await self.enqueue_task(encoded_request)
-
-    async def dequeue_prefill_request(self) -> Optional[RemotePrefillRequest]:
-        encoded_request = await self.dequeue_task()
-        if encoded_request is not None:
-            prefill_request = msgspec.json.decode(
-                encoded_request, type=RemotePrefillRequest
-            )
-            return prefill_request
-        else:
-            return None