fix: drop unused riscv64 enable option and update README

Fixes #2509

Author: Xeonacid

README.md

@@ -244,7 +244,6 @@ _23 July 2025_
 - 🌟 Adds Pyodide 0.28, which builds 3.13 wheels (#2487)
 - ✨ Support for 32-bit `manylinux_2_28` (now a consistent default) and `manylinux_2_34` added (#2500)
 - 🛠 Improved summary, will also use markdown summary output on GHA (#2469)
-- 🛠 The riscv64 images now have a working default (as they are now part of pypy/manylinux), but are still experimental (and behind an `enable`) since you can't push them to PyPI yet (#2506)
 - 🛠 Fixed a typo in the 3.9 MUSL riscv64 identifier (`cp39-musllinux_ricv64` -> `cp39-musllinux_riscv64`) (#2490)
 - 🛠 Mistyping `--only` now shows the correct possibilities, and even suggests near matches on Python 3.14+ (#2499)
 - 🛠 Only support one output from the repair step on linux like other platforms; auditwheel fixed this over four years ago! (#2478)

bin/generate_schema.py

@@ -33,7 +33,6 @@
     description: How to inherit the parent's value.
   enable:
     enum:
-      - cpython-experimental-riscv64
       - cpython-freethreading
       - cpython-prerelease
       - graalpy

cibuildwheel/resources/cibuildwheel.schema.json

@@ -13,7 +13,6 @@
     },
     "enable": {
       "enum": [
-        "cpython-experimental-riscv64",
         "cpython-freethreading",
         "cpython-prerelease",
         "graalpy",

cibuildwheel/selector.py

@@ -29,7 +29,6 @@ class EnableGroup(StrEnum):
     Groups of build selectors that are not enabled by default.
     """
 
-    CPythonExperimentalRiscV64 = "cpython-experimental-riscv64"
     CPythonFreeThreading = "cpython-freethreading"
     CPythonPrerelease = "cpython-prerelease"
     GraalPy = "graalpy"