test(examples): Drop hermetic Python toolchain

Setting up the hermetic toolchains is superfluous noise in the examples. Also,
it requires maintaining which rules_python version we use there. Plus, loading
rules_python in the examples on top of the DWYU dependencies might hide problems
with the rules_python version DWYU depends on.
Given we never had any issue with supporting multiple Python versions, we believe
using the host interpreter in the examples is fine.

examples/MODULE.bazel

@@ -6,24 +6,9 @@ local_path_override(
     path = "../",
 )
 
-#
-# One can use DWYU without the content below. The hermetic Python toolchain increases the reproducibility when
-# executing the examples as integration test.
-#
-
-# Keep in sync with //examples/WORKSPACE
-bazel_dep(name = "rules_python", version = "0.27.1", dev_dependency = True)
-
-python = use_extension(
-    "@rules_python//python/extensions:python.bzl",
-    "python",
-    dev_dependency = True,
-)
-python.toolchain(python_version = "3.8")
-
-#
-# Support to make the examples work
-#
+##
+## One can use DWYU without the content below. We simply need some further things so all examples work.
+##
 
 bazel_dep(name = "external_targets", dev_dependency = True)
 local_path_override(

examples/WORKSPACE

@@ -13,33 +13,9 @@ load("@depend_on_what_you_use//:setup_step_2.bzl", "setup_step_2")
 
 setup_step_2()
 
-#
-# One can use DWYU without the content below. The hermetic Python toolchain increases the reproducibility when
-# executing the examples as integration test.
-#
-
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
-
-# Keep in sync with //examples/MODULE.bazel
-maybe(
-    http_archive,
-    name = "rules_python",
-    sha256 = "e85ae30de33625a63eca7fc40a94fea845e641888e52f32b6beea91e8b1b2793",
-    strip_prefix = "rules_python-0.27.1",
-    urls = ["https://github.com/bazelbuild/rules_python/releases/download/0.27.1/rules_python-0.27.1.tar.gz"],
-)
-
-load("@rules_python//python:repositories.bzl", "python_register_toolchains")
-
-python_register_toolchains(
-    name = "python",
-    python_version = "3.8",
-)
-
-#
-# Support to make the examples work
-#
+##
+## One can use DWYU without the content below. We simply need some further things so all examples work.
+##
 
 load("//:support/external_targets.bzl", "load_external_targets")