MAINT: Cleanup with reviewer comments

Co-authored-by: rgommers <[email protected]>

Author: HaoZeke

.github/workflows/cibuildwheel.yml

@@ -19,7 +19,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.21.3
+        uses: pypa/cibuildwheel@v2.23.3
         env:
           CIBW_SOME_OPTION: value
         with:

README.md

@@ -48,27 +48,6 @@ pip install cymem
 Currently `Pool` is not thread safe when used from multiple threads at once;
 **please avoid sharing a single** `Pool` instance between threads.
 
-Also remember to declare `freethreading_compatible` for the example case below:
-
-``` python
-from setuptools import setup
-from Cython.Build import cythonize
-
-from Cython.Compiler.Version import version as cython_version
-from packaging.version import Version
-
-
-compiler_directives = dict()
-
-if Version(cython_version) >= Version("3.1.0"):
-    compiler_directives["freethreading_compatible"] = True
-
-setup(
-    ext_modules = cythonize("*.pyx", language_level=3,
-                                  compiler_directives=compiler_directives)
-)
-```
-
 ## Example Use Case: An array of structs
 
 Let's say we want a sequence of sparse matrices. We need fast access, and a

setup.py

@@ -18,7 +18,7 @@
 compiler_directives = dict()
 
 if Version(cython_version) >= Version("3.1.0"):
-    compiler_directives["freethreading_compatible"] =  rue
+    compiler_directives["freethreading_compatible"] =  True
 
 # By subclassing build_extensions we have the actual compiler that will be used which is really known only after finalize_options
 # http://stackoverflow.com/questions/724664/python-distutils-how-to-get-a-compiler-that-is-going-to-be-used