remove tox from dev deps

Author: oberstet

pyproject.toml

@@ -122,8 +122,6 @@ dev = [
     "sphinx>=1.7.1,<8",
     "sphinx-rtd-theme>=0.1.9",
     "sphinxcontrib-images>=0.9.1",
-    "tox-gh-actions>=2.2.0",
-    "tox>=4.2.8",
     "twine>=3.3.0",
     "twisted>=22.10.0",
     "txaio>=25.9.2",