[Refactor] Remove dependency on librosa (#2273)

Signed-off-by: Nick Cao <ncao@redhat.com>
Co-authored-by: Claude <noreply@anthropic.com>

docs/user_guide/examples/offline_inference/mimo_audio.md

@@ -189,29 +189,6 @@ Note: This task uses hardcoded message lists in the script.
 
 ## Troubleshooting
 
-### Audio dependencies (soundfile, librosa)
-
-This example depends on **soundfile** (read/write WAV) and **librosa** (load audio including MP3). Install the project requirements first:
-
-```bash
-pip install -r requirements/common.txt
-# or at least: pip install soundfile>=0.13.1 librosa>=0.11.0
-```
-
-- **`soundfile` / libsndfile not found**  
-  `soundfile` uses the C library **libsndfile**. On Linux, install the system package before pip:
-  - Debian/Ubuntu: `sudo apt-get install libsndfile1`
-  - For development builds: `sudo apt-get install libsndfile1-dev`
-  - Then: `pip install soundfile`
-
-- **`librosa` fails to load MP3 or reports "No backend available"**  
-  Loading MP3 (e.g. in `spoken_dialogue_sft_multiturn` with `.mp3` files) uses **ffmpeg** as the backend. Install ffmpeg:
-  - Debian/Ubuntu: `sudo apt-get install ffmpeg`
-  - macOS: `brew install ffmpeg`
-
-- **`ImportError: No module named 'soundfile'` or `ModuleNotFoundError: ... librosa`**  
-  Ensure you are in the same Python environment where vLLM Omni and the example dependencies are installed, and that `requirements/common.txt` (or the packages above) are installed.
-
 ### Tokenizer path
 
 - **`MIMO_AUDIO_TOKENIZER_PATH` not set or model fails to find tokenizer**