[Test] Cleanup for helpers (#6523)

Signed-off-by: wangyu <410167048@qq.com>
Signed-off-by: [Your Name] <your.email@example.com>
Co-authored-by: amy-why-3459 <wuhaiyan17@huawei.com>

tests/conftest.py

@@ -1,7 +1,10 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM-Omni project
+
 """
 Root pytest entrypoint for the vLLM-Omni test suite.
 
-- `tests/conftest.py` stays thin: plugin registration + compatibility re-exports.
+- `tests/conftest.py` stays thin: plugin registration only.
 - Importable utilities live under `tests/helpers/`.
 - Helper unit tests live under `tests/helpers/tests/`.
 - Fixtures live under `tests/helpers/fixtures/` and are loaded via `pytest_plugins`.
@@ -19,12 +22,11 @@ bootstrap_vllm_layer_custom_op_modules()
 
 pytest_plugins = (
     "tests.helpers.fixtures.config",
-    "tests.helpers.fixtures.env",
+    "tests.helpers.fixtures.clean",
     "tests.helpers.fixtures.log",
     "tests.helpers.fixtures.media",
     "tests.helpers.fixtures.run_args",
     "tests.helpers.fixtures.runtime",
-    "tests.helpers.fixtures.speaker_cache",
     "tests.helpers.fixtures.xdist",
 )
 
@@ -32,46 +34,3 @@ pytest_plugins = (
 def pytest_terminal_summary(terminalreporter, exitstatus, config):
     # Marker for Buildkite log folding before pytest summary lines.
     terminalreporter.write_line("--- Running Summary")
-
-
-# Backward-compatible lazy re-exports.
-# (Many tests still import from `tests.conftest`; migrate these imports to `tests.helpers.*` over time.)
-# Keep these lazy so conftest import does not trigger heavy helper dependencies.
-_ASSERTION_EXPORT_NAMES = (
-    "assert_audio_speech_response",
-    "assert_diffusion_response",
-    "assert_http_error",
-    "assert_image_diffusion_response",
-    "assert_image_valid",
-    "assert_omni_response",
-    "assert_video_diffusion_response",
-    "assert_video_valid",
-)
-_MEDIA_EXPORT_NAMES = (
-    "convert_audio_bytes_to_text",
-    "convert_audio_file_to_text",
-    "cosine_similarity_text",
-    "decode_b64_image",
-    "generate_synthetic_audio",
-    "generate_synthetic_image",
-    "generate_synthetic_video",
-)
-_STAGE_CONFIG_EXPORT_NAMES = ("modify_stage_config",)
-_RUNTIME_EXPORT_NAMES = (
-    "DiffusionResponse",
-    "HttpResponse",
-    "OmniResponse",
-    "OmniRunner",
-    "OmniRunnerHandler",
-    "OmniServer",
-    "OmniServerParams",
-    "OmniServerStageCli",
-    "OpenAIClientHandler",
-    "dummy_messages_from_mix_data",
-)
-_LAZY_EXPORT_MODULES = {
-    **{name: "tests.helpers.assertions" for name in _ASSERTION_EXPORT_NAMES},
-    **{name: "tests.helpers.media" for name in _MEDIA_EXPORT_NAMES},
-    **{name: "tests.helpers.stage_config" for name in _STAGE_CONFIG_EXPORT_NAMES},
-    **{name: "tests.helpers.runtime" for name in _RUNTIME_EXPORT_NAMES},
-}