Cleanup e2e directory (#5169)

test/e2e-image/.gitignore

@@ -1,4 +1,4 @@
 e2e.test
 ginkgo
 kubectl
-charts
+charts/*

test/e2e/down.sh

@@ -1,23 +0,0 @@
-#!/bin/bash
-
-# Copyright 2017 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.
-
-SCRIPT_ROOT=$(dirname ${BASH_SOURCE})/..
-
-export PATH="$HOME/.kubeadm-dind-cluster:$SCRIPT_ROOT/build:$PATH"
-
-dind-cluster-v1.11.sh down
-dind-cluster-v1.11.sh clean
-