remove a load which we missed in an earlier pr (#235)

internal_setup.bzl

diff --git a/internal_setup.bzl b/internal_setup.bzl
index 856bbda..281bac0 100644
--- a/internal_setup.bzl
+++ b/internal_setup.bzl
@@ -1,5 +1,3 @@
-load("@build_bazel_rules_nodejs//:defs.bzl", "node_repositories")
-
 # Requirements for building our piptool.
 load(
     "@piptool_deps//:requirements.bzl",