chore: remove pillow dependency requirment

Author: Wendong-Fan

pyproject.toml

@@ -29,7 +29,6 @@ dependencies = [
     "pydantic>=2.10.6,<=2.12.0",
     "httpx>=0.28.0,<1.0.0dev",
     "psutil>=5.9.8,<6",
-    "pillow>=10.1.0,<11.0.0",
     "openai>=1.86.0",
     "websockets>=13.0,<15.1",
     "astor>=0.8.1",