docs: drop stale Black, MyPy, and isort mentions from README and pyproject

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

README.md

@@ -633,9 +633,8 @@ For detailed contributing guidelines, see [CONTRIBUTING.md](CONTRIBUTING.md).
 LiteLLM follows the [Google Python Style Guide](https://google.github.io/styleguide/pyguide.html).
 
 Our automated checks include:
-- **Black** for code formatting
-- **Ruff** for linting and code quality
-- **MyPy** for type checking
+- **Ruff** for formatting, linting, and code quality
+- **basedpyright** for type checking
 - **Circular import detection**
 - **Import safety checks**
 

pyproject.toml

@@ -329,9 +329,6 @@ litellm-enterprise = { workspace = true }
 [tool.uv.workspace]
 members = ["enterprise", "litellm-proxy-extras"]
 
-[tool.isort]
-profile = "black"
-
 [tool.commitizen]
 version = "1.103.0"
 version_files = [