Replace install.py with standard requirements.txt

install.py was running arbitrary pip installs as part of node loading,
which is dangerous in a shared venv. Standard approach: requirements.txt
lists the safe deps (transformers, accelerate, soundfile, etc.);
omnivoice itself must be installed once manually with --no-deps to avoid
overwriting ComfyUI's torch. README documents this clearly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

install.py

@@ -1,33 +0,0 @@
-"""
-Installation script for ComfyUI-Omnivoice.
-
-ComfyUI Manager runs this file instead of pip-installing requirements.txt directly.
-We install omnivoice with --no-deps to avoid overwriting ComfyUI's torch installation.
-omnivoice pins torch==2.8.* from a CUDA 12.8 custom index which would break ComfyUI.
-"""
-import subprocess
-import sys
-
-
-def pip(*args):
-    subprocess.check_call([sys.executable, "-m", "pip", "install", *args])
-
-
-# Install omnivoice itself without pulling in its torch/torchaudio pins.
-# ComfyUI ships its own torch build — let it manage torch.
-pip("omnivoice", "--no-deps")
-
-# Install omnivoice's runtime inference dependencies (excludes torch, torchaudio,
-# gradio, tensorboardX, webdataset which are training/demo-only tools).
-pip(
-    "transformers>=4.40.0",
-    "accelerate",
-    "pydub",
-    "soundfile",
-    "numpy",
-    "beautifulsoup4",
-)
-
-print("\n[ComfyUI-Omnivoice] Installation complete.")
-print("[ComfyUI-Omnivoice] NOTE: omnivoice was installed without its pinned torch.")
-print("[ComfyUI-Omnivoice] If you encounter errors, ensure torch>=2.0 is installed.")