Delete extra upgrade script

This made it through the master-1.7 rebase, since the script in the 1.7
branch was named godep-update-k8s.  That one is the correct one.

hack/godeps/upgrade-k8s.sh

@@ -1,42 +0,0 @@
-#!/bin/bash
-
-# Copyright 2016 The Kubernetes Authors All rights reserved.
-#
-# 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.
-
-# This script expects 
-# K8S_VERSION = the version of kubernetes to be upgraded
-# REMOTE = the name of the git remote repository
-
-KUBE_ORG_ROOT=$GOPATH/src/k8s.io
-KUBE_ROOT=${KUBE_ORG_ROOT}/kubernetes
-MINIKUBE_ROOT=${KUBE_ORG_ROOT}/minikube
-
-UPSTREAM_REMOTE=${REMOTE:-origin}
-
-echo "Restoring old dependencies..."
-${MINIKUBE_ROOT}/hack/godeps/godep-restore.sh
-
-# Upgrade kubernetes
-pushd ${KUBE_ROOT} >/dev/null
-  echo "Upgrading to version ${K8S_VERSION}..."
-  git fetch ${UPSTREAM_REMOTE}
-  git checkout ${K8S_VERSION}
-  ./hack/godep-restore.sh
-popd >/dev/null
-
-echo "Saving new minikube dependencies..."
-${MINIKUBE_ROOT}/hack/godeps/godep-save.sh
-
-LOCALKUBE_BUCKET="minikube-builds/localkube-builds/${K8S_VERSION}" make release-localkube
-