rebase: remove speech import superseded by main adapter migration

Signed-off-by: tzhouam <tzhouam@connect.ust.hk>

vllm_omni/entrypoints/openai/serving_speech.py

@@ -28,7 +28,6 @@ from vllm.entrypoints.generate.base.protocol import RequestResponseMetadata
 from vllm.entrypoints.generate.base.serving import GenerateBaseServing as OpenAIServing
 from vllm.entrypoints.launchers.launcher import terminate_if_errored
 from vllm.entrypoints.serve.engine.protocol import ErrorResponse
-from vllm.inputs import tokens_input
 from vllm.logger import init_logger
 from vllm.multimodal.media import MediaConnector
 from vllm.utils import random_uuid