GH-92584: Remove distutils from the newtypes tutorial includes (#108024)

Doc/includes/newtypes/pyproject.toml

@@ -0,0 +1,7 @@
+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "custom"
+version = "1"

Doc/includes/newtypes/setup.py

@@ -0,0 +1,8 @@
+from setuptools import Extension, setup
+setup(ext_modules=[
+    Extension("custom", ["custom.c"]),
+    Extension("custom2", ["custom2.c"]),
+    Extension("custom3", ["custom3.c"]),
+    Extension("custom4", ["custom4.c"]),
+    Extension("sublist", ["sublist.c"]),
+])

Doc/includes/newtypes/test.py

@@ -187,13 +187,6 @@ Test cyclic gc(?)
 >>> gc.enable()
 """
 
-import os
-import sys
-from distutils.util import get_platform
-PLAT_SPEC = "%s-%d.%d" % (get_platform(), *sys.version_info[:2])
-src = os.path.join("build", "lib.%s" % PLAT_SPEC)
-sys.path.append(src)
-
 if __name__ == "__main__":
     import doctest, __main__
     doctest.testmod(__main__)

Doc/includes/setup.py

@@ -1,9 +0,0 @@
-from distutils.core import setup, Extension
-setup(name="noddy", version="1.0",
-      ext_modules=[
-         Extension("noddy", ["noddy.c"]),
-         Extension("noddy2", ["noddy2.c"]),
-         Extension("noddy3", ["noddy3.c"]),
-         Extension("noddy4", ["noddy4.c"]),
-         Extension("shoddy", ["shoddy.c"]),
-         ])