Simplify build of e2e test image

images/e2e/Makefile

@@ -1,41 +0,0 @@
-# Copyright 2018 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.
-
-TAG ?=v$(shell date +%m%d%Y)-$(shell git rev-parse --short HEAD)
-REGISTRY ?= quay.io/kubernetes-ingress-controller
-
-IMAGE = $(REGISTRY)/e2e
-
-HOST_ARCH = $(shell which go >/dev/null 2>&1 && go env GOARCH)
-ARCH ?= $(HOST_ARCH)
-ifeq ($(ARCH),)
-    $(error mandatory variable ARCH is empty, either set it when calling the command or make sure 'go env GOARCH' works)
-endif
-
-.PHONY: image
-image:
-	docker build \
-		--build-arg TARGETARCH="$(ARCH)" \
-		--build-arg K8S_RELEASE=v1.15.7 \
-		--build-arg RESTY_CLI_VERSION=0.25rc2 \
-		--build-arg RESTY_CLI_SHA=a38d850441384fa037a5922ca012dcce8708d0e4abe34ad2fe4164a01b28bdfb \
-		--build-arg CHART_TESTING_VERSION=3.0.0-beta.1 \
-		--build-arg YAML_LINT_VERSION=1.13.0 \
-		--build-arg YAMALE_VERSION=1.8.0 \
-		--build-arg HELM_VERSION=v3.2.0 \
-		-t $(IMAGE):$(TAG) rootfs
-
-.PHONY: show-image
-show-image:
-	echo -n $(IMAGE):$(TAG)