Remove unused imports (#3731)

Removes two unused slice_padding_audio_samples imports.

funasr/auto/auto_frontend.py

@@ -20,7 +20,6 @@ from funasr.download.file import download_from_url
 from funasr.auto.auto_model import prepare_data_iterator
 from funasr.utils.timestamp_tools import timestamp_sentence
 from funasr.download.download_model_from_hub import download_model
-from funasr.utils.vad_utils import slice_padding_audio_samples
 from funasr.train_utils.set_all_random_seed import set_all_random_seed
 from funasr.train_utils.load_pretrained_model import load_pretrained_model
 from funasr.utils.load_utils import load_audio_text_image_video, extract_fbank

funasr/models/fun_asr_nano/inference_vllm_pipeline.py

@@ -163,7 +163,6 @@ class FunASRNanoVLLMPipeline:
     def _process_one(self, audio_path, **kwargs):
         """Process a single audio file through the full pipeline."""
         from funasr.utils.load_utils import load_audio_text_image_video
-        from funasr.utils.vad_utils import slice_padding_audio_samples
 
         key = os.path.splitext(os.path.basename(audio_path))[0]