diff --git a/prow/lib.sh b/prow/lib.sh
index 54a1b69273d..ade72bb9cd4 100755
--- a/prow/lib.sh
+++ b/prow/lib.sh
@@ -51,111 +51,3 @@ function setup_and_export_git_sha() {
   export GIT_BRANCH
   gcloud auth configure-docker -q
 }
-
-# Download and unpack istio release artifacts.
-function download_untar_istio_release() {
-  local url_path=${1}
-  local tag=${2}
-  local dir=${3:-.}
-  # Download artifacts
-  LINUX_DIST_URL="${url_path}/istio-${tag}-linux.tar.gz"
-
-  wget  -q "${LINUX_DIST_URL}" -P "${dir}"
-  tar -xzf "${dir}/istio-${tag}-linux.tar.gz" -C "${dir}"
-
-  export ISTIOCTL_BIN="${GOPATH}/src/istio.io/istio/istio-${TAG}/bin/istioctl"
-}
-
-# Cleanup e2e resources.
-function cleanup() {
-  if [[ "${CLEAN_CLUSTERS}" == "True" ]]; then
-    unsetup_clusters
-  fi
-  if [[ "${USE_MASON_RESOURCE}" == "True" ]]; then
-    mason_cleanup
-    cat "${FILE_LOG}"
-  fi
-}
-
-# Set up a GKE cluster for testing.
-function setup_e2e_cluster() {
-  WD=$(dirname "$0")
-  WD=$(cd "$WD" || exit; pwd)
-  ROOT=$(dirname "$WD")
-
-  # shellcheck source=prow/mason_lib.sh
-  source "${ROOT}/prow/mason_lib.sh"
-  # shellcheck source=prow/cluster_lib.sh
-  source "${ROOT}/prow/cluster_lib.sh"
-
-  trap cleanup EXIT
-
-  if [[ "${USE_MASON_RESOURCE}" == "True" ]]; then
-    INFO_PATH="$(mktemp /tmp/XXXXX.boskos.info)"
-    FILE_LOG="$(mktemp /tmp/XXXXX.boskos.log)"
-    OWNER=${OWNER:-"e2e"}
-    E2E_ARGS+=("--mason_info=${INFO_PATH}")
-
-    setup_and_export_git_sha
-
-    get_resource "${RESOURCE_TYPE}" "${OWNER}" "${INFO_PATH}" "${FILE_LOG}"
-  else
-    export GIT_SHA="${GIT_SHA:-$TAG}"
-  fi
-  setup_cluster
-}
-
-function clone_cni() {
-  # Clone the CNI repo so the CNI artifacts can be built.
-  if [[ "$PWD" == "${GOPATH}/src/istio.io/istio" ]]; then
-      TMP_DIR=$PWD
-      cd ../ || return
-      git clone -b master "https://github.com/istio/cni.git"
-      cd "${TMP_DIR}" || return
-  fi
-}
-
-function check_kind() {
-  echo "Checking KinD is installed..."
-  if ! kind --help > /dev/null; then
-    echo "Looks like KinD is not installed."
-    exit 1
-  fi
-}
-
-function setup_kind_cluster() {
-  # Installing KinD
-  check_kind
-
-  # Delete any previous e2e KinD cluster
-  echo "Deleting previous KinD cluster with name=e2e-suite"
-  if ! (kind delete cluster --name=e2e-suite) > /dev/null; then
-    echo "No Found existing kind cluster with name e2e-suite. Continue..."
-  fi
-
-  # Create KinD cluster
-  if ! (kind create cluster --name=e2e-suite); then
-    echo "Could not setup KinD environment. Something wrong with KinD setup. Please check your setup and try again."
-    exit 1
-  fi
-  KUBECONFIG="$(kind get kubeconfig-path --name="e2e-suite")"
-  export KUBECONFIG
-}
-
-function cni_run_daemon() {
-
-  echo 'Run the CNI daemon set'
-  ISTIO_CNI_HUB=${ISTIO_CNI_HUB:-gcr.io/istio-release}
-  ISTIO_CNI_TAG=${ISTIO_CNI_TAG:-master-latest-daily}
-
-  chartdir=$(pwd)/charts
-  mkdir "${chartdir}"
-  helm init --client-only
-  helm repo add istio.io https://gcsweb.istio.io/gcs/istio-prerelease/daily-build/release-1.1-latest-daily/charts/
-  helm fetch --untar --untardir "${chartdir}" istio.io/istio-cni
-
-  helm template --values "${chartdir}"/istio-cni/values.yaml --name=istio-cni --namespace=kube-system --set "excludeNamespaces={}" --set cniBinDir=/home/kubernetes/bin --set hub="${ISTIO_CNI_HUB}" --set tag="${ISTIO_CNI_TAG}" --set pullPolicy=IfNotPresent --set logLevel="${CNI_LOGLVL:-debug}"  "${chartdir}"/istio-cni > istio-cni_install.yaml
-
-  kubectl apply -f istio-cni_install.yaml
-
-}