[Misc][V0 Deprecation] Remove V0 related codes of test, example, platform (#1805)

### What this PR does / why we need it?
Remove V0 related codes of test, example, platform.

This PR is a part of
https://github.com/vllm-project/vllm-ascend/issues/1620.

- vLLM version: v0.9.2
- vLLM main:
235bfd5dfe

---------

Signed-off-by: shen-shanshan <467638484@qq.com>

examples/offline_inference_npu_v0.py

@@ -1,44 +0,0 @@
-#
-# Copyright (c) 2025 Huawei Technologies Co., Ltd. All Rights Reserved.
-# Copyright 2023 The vLLM team.
-#
-# 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.
-# This file is a part of the vllm-ascend project.
-# Adapted from vllm-project/vllm/examples/offline_inference/basic.py
-#
-
-import os
-
-os.environ["VLLM_USE_V1"] = "0"
-os.environ["VLLM_USE_MODELSCOPE"] = "True"
-
-from vllm import LLM, SamplingParams
-
-prompts = [
-    "Hello, my name is",
-    "The president of the United States is",
-    "The capital of France is",
-    "The future of AI is",
-]
-
-# Create a sampling params object.
-sampling_params = SamplingParams(max_tokens=100, temperature=0.0)
-# Create an LLM.
-llm = LLM(model="Qwen/Qwen2.5-0.5B-Instruct")
-
-# Generate texts from the prompts.
-outputs = llm.generate(prompts, sampling_params)
-for output in outputs:
-    prompt = output.prompt
-    generated_text = output.outputs[0].text
-    print(f"Prompt: {prompt!r}, Generated text: {generated_text!r}")