cleanup: delete defunct load of bzlmod pip_repository (#1533)

The non-bzlmod pip_repository code loads the bzlmod pip_repository code
for some reason,
but nothing else uses that reference. A comment indicates it was only
done to make
merge conflicts easier to manage for PR #1476.

python/pip_install/BUILD.bazel

diff --git a/python/pip_install/BUILD.bazel b/python/pip_install/BUILD.bazel
index 4304fb5..c39ca6a 100644
--- a/python/pip_install/BUILD.bazel
+++ b/python/pip_install/BUILD.bazel
@@ -34,7 +34,6 @@
         "//python/private:render_pkg_aliases_bzl",
         "//python/private:toolchains_repo_bzl",
         "//python/private:which_bzl",
-        "//python/private/bzlmod:pip_repository_bzl",
     ],
 )
 

python/pip_install/pip_repository.bzl

diff --git a/python/pip_install/pip_repository.bzl b/python/pip_install/pip_repository.bzl
index b9b9a07..f018f65 100644
--- a/python/pip_install/pip_repository.bzl
+++ b/python/pip_install/pip_repository.bzl
@@ -26,7 +26,6 @@
 load("//python/private:render_pkg_aliases.bzl", "render_pkg_aliases")
 load("//python/private:toolchains_repo.bzl", "get_host_os_arch")
 load("//python/private:which.bzl", "which_with_fail")
-load("//python/private/bzlmod:pip_repository.bzl", _pip_hub_repository_bzlmod = "pip_repository")
 
 CPPFLAGS = "CPPFLAGS"
 
@@ -34,9 +33,6 @@
 
 _WHEEL_ENTRY_POINT_PREFIX = "rules_python_wheel_entry_point"
 
-# Kept for not creating merge conflicts with PR#1476, can be removed later.
-pip_hub_repository_bzlmod = _pip_hub_repository_bzlmod
-
 def _construct_pypath(rctx):
     """Helper function to construct a PYTHONPATH.