CI: clean up wheel build workarounds now that Cython 3.1.0 is out

.gitattributes

@@ -84,5 +84,3 @@ pandas/tests/io/parser/data export-ignore
 
 # Include cibw script in sdist since it's needed for building wheels
 scripts/cibw_before_build.sh -export-ignore
-scripts/cibw_before_build_windows.sh -export-ignore
-scripts/cibw_before_test_windows.sh -export-ignore

.github/workflows/wheels.yml

@@ -102,10 +102,6 @@ jobs:
         # TODO: support PyPy?
         python: [["cp310", "3.10"], ["cp311", "3.11"], ["cp312", "3.12"], ["cp313", "3.13"], ["cp313t", "3.13"]]
         include:
-        # TODO: Remove this plus installing build deps in cibw_before_build.sh
-        # after pandas can be built with a released NumPy/Cython
-        - python: ["cp313t", "3.13"]
-          cibw_build_frontend: 'pip; args: --no-build-isolation'
         # Build Pyodide wheels and upload them to Anaconda.org
         # NOTE: this job is similar to the one in unit-tests.yml except for the fact
         # that it uses cibuildwheel instead of a standard Pyodide xbuildenv setup.

MANIFEST.in

@@ -65,5 +65,3 @@ graft pandas/_libs/include
 
 # Include cibw script in sdist since it's needed for building wheels
 include scripts/cibw_before_build.sh
-include scripts/cibw_before_build_windows.sh
-include scripts/cibw_before_test_windows.sh

pyproject.toml

@@ -154,12 +154,12 @@ test-command = """
   pd.test(extra_args=["-m not clipboard and not single_cpu and not slow and not network and not db", "-n 2", "--no-strict-data-files"]); \
   pd.test(extra_args=["-m not clipboard and single_cpu and not slow and not network and not db", "--no-strict-data-files"]);' \
   """
-free-threaded-support = true
+enable = ["cpython-freethreading"]
 before-build = "PACKAGE_DIR={package} bash {package}/scripts/cibw_before_build.sh"
 
 [tool.cibuildwheel.windows]
 environment = {}
-before-build = "pip install delvewheel && bash {package}/scripts/cibw_before_build_windows.sh"
+before-build = "pip install delvewheel"
 test-command = """
   set PANDAS_CI='1' && \
   python -c "import pandas as pd; \

scripts/cibw_before_build.sh

@@ -3,11 +3,3 @@
 for file in $PACKAGE_DIR/LICENSES/*; do
   cat $file >> $PACKAGE_DIR/LICENSE
 done
-
-# TODO: Delete when there's a PyPI Cython release that supports free-threaded Python 3.13.
-FREE_THREADED_BUILD="$(python -c"import sysconfig; print(bool(sysconfig.get_config_var('Py_GIL_DISABLED')))")"
-if [[ $FREE_THREADED_BUILD == "True" ]]; then
-    python -m pip install -U pip
-    python -m pip install -i https://pypi.anaconda.org/scientific-python-nightly-wheels/simple cython
-    python -m pip install numpy ninja meson-python versioneer[toml]
-fi