Update pyproject.toml to address Issue #12215 (#12245)

Remove unnecessary dependency on asyncio>3.4.3. Poetry file defines python >=3.8.1. asyncio is part of standard libraries from 3.7 onwards.

Dependency being removed as some versions of pip are installing the asyncio version 3.4.3 (2015)

llama-index-networks/pyproject.toml

@@ -43,7 +43,6 @@ python-jose = "^3.3.0"
 uvicorn = {extras = ["standard"], version = "^0.27.1"}
 pydantic = {extras = ["dotenv"], version = "^2.6.1"}
 python-dotenv = "^1.0.1"
-asyncio = "^3.4.3"
 aiohttp = "^3.9.3"
 
 [tool.poetry.group.dev.dependencies]