chore(internal): remove unused black config (#1807)

Author: stainless-app[bot]

Diff for: pyproject.toml

@@ -66,7 +66,6 @@ format = { chain = [
   # run formatting again to fix any inconsistencies when imports are stripped
   "format:ruff",
 ]}
-"format:black" = "black ."
 "format:docs" = "python scripts/utils/ruffen-docs.py README.md api.md"
 "format:ruff" = "ruff format"
 
@@ -126,10 +125,6 @@ path = "README.md"
 pattern = '\[(.+?)\]\(((?!https?://)\S+?)\)'
 replacement = '[\1](https://github.com/openai/openai-python/tree/main/\g<2>)'
 
-[tool.black]
-line-length = 120
-target-version = ["py37"]
-
 [tool.pytest.ini_options]
 testpaths = ["tests"]
 addopts = "--tb=short"