Delete Helm and Kustomize binaries in Dockerfile (#5041)

remove helm and kustomize binary file

build/ks-apiserver/Dockerfile

@@ -5,9 +5,6 @@
 # Download dependencies
 FROM alpine:3.11 as base_os_context
 
-ARG TARGETARCH
-ARG TARGETOS
-ARG HELM_VERSION=v3.5.2
 
 ENV OUTDIR=/out
 RUN mkdir -p ${OUTDIR}/usr/local/bin/
@@ -16,10 +13,6 @@ WORKDIR /tmp
 
 RUN apk add --no-cache ca-certificates
 
-# install helm
-ADD https://get.helm.sh/helm-${HELM_VERSION}-${TARGETOS}-${TARGETARCH}.tar.gz /tmp
-RUN tar xvzf /tmp/helm-${HELM_VERSION}-${TARGETOS}-${TARGETARCH}.tar.gz -C /tmp
-RUN mv /tmp/${TARGETOS}-${TARGETARCH}/helm ${OUTDIR}/usr/local/bin/
 
 # Build 
 FROM golang:1.16.3 as build_context