Update requirements.txt

requirements.txt

@@ -6,6 +6,4 @@ soundfile
 librosa
 google-genai
 huggingface_hub>=0.24.0
-# Chatterbox pins exact versions of torch/torchaudio/transformers (see the
-# note in README.md) — pip will resolve those over the loose bounds above.
-chatterbox-tts
+kokoro>=0.5.0