diff --git a/DEVELOP.md b/DEVELOP.md
@@ -1,13 +1,5 @@
# Developer's note

-## Wheels
-
-Wheels for macOS and Linux are built on Travis and AppVeyr, in
-[methane/msgpack-wheels](https://github.com/methane/msgpack-wheels) repository.
-
-Wheels for Windows are built on Github Actions in this repository.
-
-
### Build

```

diff --git a/pyproject.toml b/pyproject.toml
@@ -1,9 +1,8 @@
[build-system]
requires = [
-    # Also declared in requirements.txt, if updating here please also update
-    # there
-    "Cython~=3.0.8",
-    "setuptools >= 35.0.2",
]
build-backend = "setuptools.build_meta"