cleanup: remove vendored copy of skylib (#1003)

Following #1001 we require that users install bazel-skylib, so we are now free to load from it.

Author: alexeagle

BUILD.bazel

@@ -35,9 +35,6 @@ filegroup(
         "//gazelle:distribution",
         "//python:distribution",
         "//python/pip_install:distribution",
-        "//third_party/github.com/bazelbuild/bazel-skylib/lib:distribution",
-        "//third_party/github.com/bazelbuild/bazel-skylib/rules:distribution",
-        "//third_party/github.com/bazelbuild/bazel-skylib/rules/private:distribution",
         "//tools:distribution",
     ],
     visibility = [

docs/BUILD.bazel

@@ -109,7 +109,7 @@ stardoc(
     deps = [
         ":bazel_repo_tools",
         ":pip_install_bzl",
-        "//third_party/github.com/bazelbuild/bazel-skylib/lib:versions",
+        "@bazel_skylib//lib:versions",
     ],
 )
 
@@ -122,7 +122,7 @@ stardoc(
         ":bazel_repo_tools",
         ":pip_install_bzl",
         ":requirements_parser_bzl",
-        "//third_party/github.com/bazelbuild/bazel-skylib/lib:versions",
+        "@bazel_skylib//lib:versions",
     ],
 )
 

examples/multi_python_versions/WORKSPACE

@@ -5,14 +5,14 @@ local_repository(
     path = "../..",
 )
 
-load("@rules_python//python/pip_install:repositories.bzl", "pip_install_dependencies")
-
-pip_install_dependencies()
-
 load("@rules_python//python:repositories.bzl", "py_repositories", "python_register_multi_toolchains")
 
 py_repositories()
 
+load("@rules_python//python/pip_install:repositories.bzl", "pip_install_dependencies")
+
+pip_install_dependencies()
+
 default_python_version = "3.9"
 
 python_register_multi_toolchains(

python/pip_install/repositories.bzl

@@ -1,11 +1,9 @@
 ""
 
+load("@bazel_skylib//lib:versions.bzl", "versions")
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
 
-# Avoid a load from @bazel_skylib repository as users don't necessarily have it installed
-load("//third_party/github.com/bazelbuild/bazel-skylib/lib:versions.bzl", "versions")
-
 _RULE_DEPS = [
     (
         "pypi__build",

python/pip_install/tools/wheel_installer/wheel_installer.py

@@ -226,7 +226,7 @@ def _generate_build_file_contents(
             textwrap.dedent(
                 """\
         load("@rules_python//python:defs.bzl", "py_library", "py_binary")
-        load("@rules_python//third_party/github.com/bazelbuild/bazel-skylib/rules:copy_file.bzl", "copy_file")
+        load("@bazel_skylib//rules:copy_file.bzl", "copy_file")
 
         package(default_visibility = ["//visibility:public"])
 

tests/compile_pip_requirements/WORKSPACE

@@ -3,12 +3,14 @@ local_repository(
     path = "../..",
 )
 
+load("@rules_python//python:repositories.bzl", "py_repositories", "python_register_toolchains")
+
+py_repositories()
+
 load("@rules_python//python/pip_install:repositories.bzl", "pip_install_dependencies")
 
 pip_install_dependencies()
 
-load("@rules_python//python:repositories.bzl", "python_register_toolchains")
-
 python_register_toolchains(
     name = "python39",
     python_version = "3.9",