Remove unused find_cuda_init helper script (#25044)

find_cuda_init.py

-# SPDX-License-Identifier: Apache-2.0
-# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
-
-import importlib
-import traceback
-from typing import Callable
-from unittest.mock import patch
-
-
-def find_cuda_init(fn: Callable[[], object]) -> None:
-    """
-    Helper function to debug CUDA re-initialization errors.
-
-    If `fn` initializes CUDA, prints the stack trace of how this happens.
-    """
-    from torch.cuda import _lazy_init
-
-    stack = None
-
-    def wrapper():
-        nonlocal stack
-        stack = traceback.extract_stack()
-        return _lazy_init()
-
-    with patch("torch.cuda._lazy_init", wrapper):
-        fn()
-
-    if stack is not None:
-        print("==== CUDA Initialized ====")
-        print("".join(traceback.format_list(stack)).strip())
-        print("==========================")
-
-
-if __name__ == "__main__":
-    find_cuda_init(
-        lambda: importlib.import_module("vllm.model_executor.models.llava"))