remove hack/update-workspace-mirror.sh

this was used to mirror certain bazel dependencies.

hack/update-workspace-mirror.sh

@@ -1,43 +0,0 @@
-#!/usr/bin/env bash
-
-# Copyright 2018 The Kubernetes Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-set -o errexit
-set -o nounset
-set -o pipefail
-
-if [[ $# -ne 1 ]]; then
-    echo 'use "bazel run //hack:update-mirror"'
-    echo "(usage: $0 <file with list of URLs to mirror>)"
-    exit 1
-fi
-
-BUCKET="gs://k8s-bazel-cache"
-
-gsutil acl get "${BUCKET}" > /dev/null
-
-tmpfile=$(mktemp bazel_workspace_mirror.XXXXXX)
-trap 'rm ${tmpfile}' EXIT
-while read -r url; do
-  echo "${url}"
-  if gsutil ls "${BUCKET}/${url}" &> /dev/null; then
-    echo present
-  else
-    echo missing
-    if curl -fLag "${url}" > "${tmpfile}"; then
-        gsutil cp -a public-read "${tmpfile}" "${BUCKET}/${url}"
-    fi
-  fi
-done < "$1"