[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/bagel.md

@@ -250,13 +250,6 @@ For more details on the Mooncake connector and multi-node setup, see the [Moonca
 
 ## FAQ
 
-- If you encounter an error about the backend of librosa, try to install ffmpeg with the command below.
-
-```bash
-sudo apt update
-sudo apt install ffmpeg
-```
-
 - If you don’t know how much VRAM is needed for the model or encounter the OOM error, you can try to decrease the max_model_len.
 
 | Stage               | VRAM                         |

docs/user_guide/examples/offline_inference/cosyvoice3.md

@@ -10,7 +10,7 @@ Install dependencies:
 uv pip install -e .
 ```
 
-> **Note:** This includes required libraries such as `librosa`, `soundfile`,
+> **Note:** This includes required libraries such as `soundfile`,
 > `onnxruntime`, `x-transformers`, and `einops` via
 > `requirements/common.txt` and platform-specific requirements files.
 

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**  

docs/user_guide/examples/offline_inference/qwen2_5_omni.md

@@ -64,14 +64,6 @@ If media file paths are not provided, the script will use default assets. Suppor
 - `use_audio_in_video`: Extract audio from video
 - `text`: Text-only query
 
-### FAQ
-
-If you encounter error about backend of librosa, try to install ffmpeg with command below.
-```
-sudo apt update
-sudo apt install ffmpeg
-```
-
 ## Example materials
 
 ??? abstract "end2end.py"

docs/user_guide/examples/offline_inference/qwen3_omni.md

@@ -112,14 +112,6 @@ python end2end_async_chunk.py \
 > async_chunk example when you need the stage-level concurrency semantics
 > described in PR #962 / #1151.
 
-### FAQ
-
-If you encounter error about backend of librosa, try to install ffmpeg with command below.
-```
-sudo apt update
-sudo apt install ffmpeg
-```
-
 ## Example materials
 
 ??? abstract "end2end.py"