remove unneeded references to sass and skydoc. stardoc does not need them (#233)

internal_deps.bzl

diff --git a/internal_deps.bzl b/internal_deps.bzl
index 160e68e..26ca85d 100644
--- a/internal_deps.bzl
+++ b/internal_deps.bzl
@@ -1,11 +1,10 @@
-load("@bazel_federation//:repositories.bzl", "bazel_stardoc", "rules_sass")
+load("@bazel_federation//:repositories.bzl", "bazel_stardoc")
 load("@bazel_federation//:third_party_repositories.bzl", "futures_2_whl", "futures_3_whl", "google_cloud_language_whl", "grpc_whl", "mock_whl", "subpar")
 load("@rules_python//python:pip.bzl", "pip_import")
 
 
 def rules_python_internal_deps():
     bazel_stardoc()
-    rules_sass()
 
     subpar()
 

internal_setup.bzl

diff --git a/internal_setup.bzl b/internal_setup.bzl
index 063d136..856bbda 100644
--- a/internal_setup.bzl
+++ b/internal_setup.bzl
@@ -1,7 +1,4 @@
 load("@build_bazel_rules_nodejs//:defs.bzl", "node_repositories")
-load("@io_bazel_rules_sass//:defs.bzl", "sass_repositories")
-load("@io_bazel_rules_sass//:package.bzl", "rules_sass_dependencies")
-load("@io_bazel_skydoc//:setup.bzl", "skydoc_repositories")
 
 # Requirements for building our piptool.
 load(
@@ -29,14 +26,6 @@
 
 
 def rules_python_internal_setup():
-    # TODO(fweikert): The following four function calls should be replaced with
-    # bazel_stardoc_setup(), rules_sass_setup() and rules_nodejs_setup().
-    # However, those setup functions don't exist yet.
-    skydoc_repositories()
-    rules_sass_dependencies()
-    node_repositories()
-    sass_repositories()
-
     # Requirements for building our piptool.
     _piptool_install()