diff --git a/cos/README.md b/cos/README.md
deleted file mode 100644
index a4895f0..0000000
--- a/cos/README.md
+++ /dev/null
@@ -1,8 +0,0 @@
-This folder contains image utilities from Container-Optimized OS(COS) team
-to fullfill the functionalities to support image formwat convertion between
-different platfroms:
-
-* COS on vSphere
-* COS on AWS
-* COS on AZure
-* COS on Borg
diff --git a/cos/convert_image.sh b/cos/convert_image.sh
deleted file mode 100755
index 508b9b1..0000000
--- a/cos/convert_image.sh
+++ /dev/null
@@ -1,62 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2021 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# convert_image.sh --board=[board] --image_type=[type] --image_format=[format]
-#
-# This script converts a board's image(base, test, dev) to the specified format
-# like vmdk, vhd so that the image can be used by platform other than GCP.
-#
-SCRIPT_ROOT=$(dirname $(readlink -f "$0"))
-SCRIPT_ROOT=${SCRIPT_ROOT%cos}
-. "${SCRIPT_ROOT}/build_library/build_common.sh" || exit 1
-
-# Script must be run inside the chroot.
-restart_in_chroot_if_needed "$@"
-
-DEFINE_string board "${DEFAULT_BOARD}" \
-  "The board to build an image for."
-DEFINE_string image_type "base" \
-  "Image type to process, base, test or dev."
-DEFINE_string image_format "" \
-  "Image format to be converted to, vmdk or vhd."
-DEFINE_string image_dir "" "Path to the folder to store netboot images."
-
-# Parse command line.
-FLAGS "$@" || exit 1
-eval set -- "${FLAGS_ARGV}"
-
-. "${SCRIPT_ROOT}/build_library/build_common.sh" || exit 1
-. "${BUILD_LIBRARY_DIR}/board_options.sh" || exit 1
-
-switch_to_strict_mode
-
-set -x
-# build_packages artifact output.
-SYSROOT="${GCLIENT_ROOT}/chroot/build/${FLAGS_board}"
-# build_image artifact output.
-
-IMAGE_DIR="${CHROOT_TRUNK_DIR}"/src/build/images/"${FLAGS_board}"/latest
-if [ -n "${FLAGS_image_dir}" ]; then
-  IMAGE_DIR=${FLAGS_image_dir}
-fi
-IMAGE_TYPE=${FLAGS_image_type}
-
-case ${FLAGS_image_format} in
-  "vmdk")
-  qemu-img convert -p -o subformat=streamOptimized -O vmdk\
-    ${IMAGE_DIR}/chromiumos_${IMAGE_TYPE}_image.bin \
-    ${IMAGE_DIR}/chromiumos_${IMAGE_TYPE}_image.vmdk
-  ;;
-
-  "vhd")
-  qemu-img convert -f raw -o subformat=fixed,force_size -O vpc \
-    ${IMAGE_DIR}/chromiumos_${IMAGE_TYPE}_image.bin \
-    ${IMAGE_DIR}/chromiumos_${IMAGE_TYPE}_image.vhd
-  ;;
-
-  *)
-  ;;
-esac
diff --git a/cos/cos.json b/cos/cos.json
deleted file mode 100644
index a22b87e..0000000
--- a/cos/cos.json
+++ /dev/null
@@ -1,42 +0,0 @@
-{
-    "DiskProvisioning": "thin",
-    "IPAllocationPolicy": "dhcpPolicy",
-    "IPProtocol": "IPv4",
-    "InjectOvfEnv": false,
-    "MarkAsTemplate": false,
-    "Name": null,
-    "NetworkMapping": [
-        {
-            "Name": "VM Network",
-            "Network": ""
-        }
-    ],
-    "PowerOn": false,
-    "PropertyMapping": [
-        {
-            "Key": "instance-id",
-            "Value": "id-ovf"
-        },
-        {
-            "Key": "hostname",
-            "Value": ""
-        },
-        {
-            "Key": "seedfrom",
-            "Value": ""
-        },
-        {
-            "Key": "public-keys",
-            "Value": ""
-        },
-        {
-            "Key": "user-data",
-            "Value": ""
-        },
-        {
-            "Key": "password",
-            "Value": ""
-        }
-    ],
-    "WaitForIP": false
-}
diff --git a/cos/make_ova.sh b/cos/make_ova.sh
deleted file mode 100755
index 543a890..0000000
--- a/cos/make_ova.sh
+++ /dev/null
@@ -1,95 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2021 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-#
-# make_ova.sh -d [vmdk file] -o [ova file] -p[product-name] \
-#  -n[image-name] -t ${TEMPLATE_OVF}
-#
-# This scripts creates .ova file from given disk image and OVA template.
-#
-
-set -o xtrace
-set -o errexit
-set -o nounset
-
-SCRIPT_ROOT=$(dirname $(readlink -f "$0"))
-TEMPLATE_PATH=${SCRIPT_ROOT}/template.ovf
-WORKSPACE=${SCRIPT_ROOT%\/src\/scripts\/cos}
-BOARD=anthos-amd64-vsphere
-PRODUCT_NAME="Anthos OnPrem on COS"
-IMAGE_NAME="COS"
-IMAGE_TYPE="test"
-IMAGE_ROOT=${WORKSPACE}/src/build/images/${BOARD}/latest
-DISK_FILE=${IMAGE_ROOT}/chromiumos_${IMAGE_TYPE}_image.vmdk
-OUTPUT_FILE=${IMAGE_ROOT}/chromiumos_${IMAGE_TYPE}_image.ova
-
-usage() {
-  echo "Usage: $0 -b board -d disk.vmdk \
-    -p product-name -n image-name \
-    -o output-file [-t template.ovf]"
-}
-
-while getopts ":b:d:p:n:t:o:h" arg; do
-  case $arg in
-    b) BOARDD=$OPTARG ;;
-    d) DISK_FILE=$OPTARG ;;
-    p) PRODUCT_NAME=$OPTARG ;;
-    n) IMAGE_NAME=$OPTARG ;;
-    t) TEMPLATE_PATH=$OPTARG ;;
-    o) OUTPUT_FILE=$OPTARG ;;
-    h)
-      usage
-      exit 0
-      ;;
-    *)
-      usage
-      exit 1
-      ;;
-  esac
-done
-
-: "${BOARD?Missing -d BOARD value}"
-: "${DISK_FILE?Missing -d DISK_FILE value}"
-: "${PRODUCT_NAME?Missing -p PRODUCT_NAME value}"
-: "${IMAGE_NAME?Missing -n IMAGE_NAME value}"
-: "${TEMPLATE_PATH?Missing -t TEMPLATE_PATH value}"
-: "${OUTPUT_FILE?Missing -o OUTPUT_FILE value}"
-
-if [[ ! -f ${TEMPLATE_PATH} ]]; then
-  echo "Cannot find template at ${TEMPLATE_PATH}"
-  exit 1
-fi
-
-XML_NS=(
-  -N 'x=http://schemas.dmtf.org/ovf/envelope/1'
-  -N 'ovf=http://schemas.dmtf.org/ovf/envelope/1'
-  -N 'vssd=http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_VirtualSystemSettingData'
-)
-
-WORK_DIR=$(mktemp -d)
-trap 'rm -rf "${WORK_DIR}"' EXIT
-
-# xmlstar does not support multiple updates at once, and we need to provide
-# namespaces to every invocation, so disable quoting warning.
-# shellcheck disable=SC2086
-xmlstarlet ed ${XML_NS[*]} \
-  --update '//x:VirtualSystem/@ovf:id' --value "${IMAGE_NAME}" \
-  "${TEMPLATE_PATH}" \
-  | xmlstarlet ed ${XML_NS[*]} \
-    --update '//x:VirtualSystem/x:Name' --value "${IMAGE_NAME}" \
-  | xmlstarlet ed ${XML_NS[*]} \
-    --update '//vssd:VirtualSystemIdentifier' --value "${IMAGE_NAME}" \
-    > "${WORK_DIR}/tmp.ovf"
-
-# Add a disk image to temporary .ovf
-cot --force add-disk "${DISK_FILE}" "${WORK_DIR}/tmp.ovf" \
-  -o "${WORK_DIR}/image.ovf" \
-  -f vmdisk1 -t harddisk -c scsi
-
-# Add product information and convert .ovf to .ova
-cot --force edit-product "${WORK_DIR}/image.ovf" \
-  -o "${OUTPUT_FILE}" \
-  --product "${PRODUCT_NAME}"
-
diff --git a/cos/run_vmtests.sh b/cos/run_vmtests.sh
deleted file mode 100755
index ee25665..0000000
--- a/cos/run_vmtests.sh
+++ /dev/null
@@ -1,60 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2021 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# cos/run_vmtests.sh --board=[anthos-amd64-vsphere]
-#
-# This script builds and runs VMTests for a given board.
-
-SCRIPT_ROOT=$(dirname $(readlink -f "$0"))
-SCRIPT_ROOT=${SCRIPT_ROOT%cos}
-. "${SCRIPT_ROOT}/build_library/build_common.sh" || exit 1
-
-# Script must be run inside the chroot.
-restart_in_chroot_if_needed "$@"
-
-DEFINE_string board "${DEFAULT_BOARD}" \
-  "The board to build an image for."
-DEFINE_string image_type "test" \
-  "Image type to process, base, test or dev."
-DEFINE_string image_dir "" "Path to the folder to store netboot images."
-
-# Parse command line.
-FLAGS "$@" || exit 1
-eval set -- "${FLAGS_ARGV}"
-
-. "${SCRIPT_ROOT}/build_library/build_common.sh" || exit 1
-. "${BUILD_LIBRARY_DIR}/board_options.sh" || exit 1
-
-switch_to_strict_mode
-
-set -x
-# build_packages artifact output.
-SYSROOT="${GCLIENT_ROOT}/chroot/build/${FLAGS_board}"
-# build_image artifact output.
-
-IMAGE_DIR="${CHROOT_TRUNK_DIR}"/src/build/images/"${FLAGS_board}"/latest
-if [ -n "${FLAGS_image_dir}" ]; then
-  IMAGE_DIR=${FLAGS_image_dir}
-fi
-
-BOARD_ARCH=$(portageq-${FLAGS_board} envvar ARCH)
-if [[ ${BOARD_ARCH} == "amd64" ]]; then
-  BOARD_ARCH="x86_64"
-elif [[ ${BOARD_ARCH} == "arm64" ]]; then
-  BOARD_ARCH="aarch64"
-else
-  echo "Unsupported ${BOARD_ARCH}"
-  exit 1
-fi
-
-cros_run_vm_test --board ${BOARD} \
-  --image-path ${IMAGE_DIR}/chromiumos_${FLAGS_image_type}_image.bin \
-  --private-key ${IMAGE_DIR}/id_rsa \
-  --test_that-args=--model=ad_hoc_model \
-  --copy-on-write \
-  --start-vm \
-  --qemu-arch ${BOARD_ARCH} \
-  --autotest 'suite:smoke'
diff --git a/cos/template.ovf b/cos/template.ovf
deleted file mode 100644
index f8b5220..0000000
--- a/cos/template.ovf
+++ /dev/null
@@ -1,147 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Envelope xmlns="http://schemas.dmtf.org/ovf/envelope/1" xmlns:cim="http://schemas.dmtf.org/wbem/wscim/1/common" xmlns:ovf="http://schemas.dmtf.org/ovf/envelope/1" xmlns:rasd="http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_ResourceAllocationSettingData" xmlns:vmw="http://www.vmware.com/schema/ovf" xmlns:vssd="http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_VirtualSystemSettingData" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
-  <References>
-  </References>
-  <DiskSection>
-    <Info>Virtual disk information</Info>
-  </DiskSection>
-  <NetworkSection>
-    <Info>The list of logical networks</Info>
-    <Network ovf:name="VM Network">
-      <Description>The VM Network network</Description>
-    </Network>
-  </NetworkSection>
-  <VirtualSystem ovf:id="__NAME__">
-    <Info>A virtual machine</Info>
-    <Name>__NAME__</Name>
-    <OperatingSystemSection ovf:id="94" vmw:osType="genericLinuxGuest">
-      <Info>The kind of installed guest operating system</Info>
-      <Description>Other Linux</Description>
-    </OperatingSystemSection>
-
-    <ProductSection ovf:required="false">
-      <Info>Cloud-Init customization</Info>
-      <Product>__PRODUCT_REPLACED_BY_COT__</Product>
-      <Property ovf:key="instance-id" ovf:type="string" ovf:userConfigurable="true" ovf:value="id-ovf">
-          <Label>A Unique Instance ID for this instance</Label>
-          <Description>Specifies the instance id.  This is required and used to determine if the machine should take "first boot" actions</Description>
-      </Property>
-      <Property ovf:key="hostname" ovf:type="string" ovf:userConfigurable="true" ovf:value="cosguest">
-          <Description>Specifies the hostname for the appliance</Description>
-      </Property>
-      <Property ovf:key="seedfrom" ovf:type="string" ovf:userConfigurable="true">
-          <Label>Url to seed instance data from</Label>
-          <Description>This field is optional, but indicates that the instance should 'seed' user-data and meta-data from the given url.  If set to 'http://tinyurl.com/sm-' is given, meta-data will be pulled from http://tinyurl.com/sm-meta-data and user-data from http://tinyurl.com/sm-user-data.  Leave this empty if you do not want to seed from a url.</Description>
-      </Property>
-      <Property ovf:key="public-keys" ovf:type="string" ovf:userConfigurable="true" ovf:value="">
-          <Label>ssh public keys</Label>
-          <Description>This field is optional, but indicates that the instance should populate the default user's 'authorized_keys' with this value</Description>
-      </Property>
-      <Property ovf:key="user-data" ovf:type="string" ovf:userConfigurable="true" ovf:value="">
-          <Label>Encoded user-data</Label>
-          <Description>In order to fit into a xml attribute, this value is base64 encoded . It will be decoded, and then processed normally as user-data.</Description>
-          <!--  The following represents '#!/bin/sh\necho "hi world"'
-          ovf:value="IyEvYmluL3NoCmVjaG8gImhpIHdvcmxkIgo="
-        -->
-      </Property>
-      <Property ovf:key="password" ovf:type="string" ovf:userConfigurable="true" ovf:value="">
-          <Label>Default User's password</Label>
-          <Description>If set, the default user's password will be set to this value to allow password based login.  The password will be good for only a single login.  If set to the string 'RANDOM' then a random password will be generated, and written to the console.</Description>
-      </Property>
-    </ProductSection>
-
-    <VirtualHardwareSection ovf:transport="com.vmware.guestInfo">
-      <Info>Virtual hardware requirements</Info>
-      <System>
-        <vssd:ElementName>Virtual Hardware Family</vssd:ElementName>
-        <vssd:InstanceID>0</vssd:InstanceID>
-        <vssd:VirtualSystemIdentifier>__NAME__</vssd:VirtualSystemIdentifier>
-        <vssd:VirtualSystemType>vmx-13</vssd:VirtualSystemType>
-      </System>
-      <Item>
-        <rasd:AllocationUnits>hertz * 10^6</rasd:AllocationUnits>
-        <rasd:Description>Number of Virtual CPUs</rasd:Description>
-        <rasd:ElementName>2 virtual CPU(s)</rasd:ElementName>
-        <rasd:InstanceID>1</rasd:InstanceID>
-        <rasd:ResourceType>3</rasd:ResourceType>
-        <rasd:VirtualQuantity>2</rasd:VirtualQuantity>
-      </Item>
-      <Item>
-        <rasd:AllocationUnits>byte * 2^20</rasd:AllocationUnits>
-        <rasd:Description>Memory Size</rasd:Description>
-        <rasd:ElementName>1024MB of memory</rasd:ElementName>
-        <rasd:InstanceID>2</rasd:InstanceID>
-        <rasd:ResourceType>4</rasd:ResourceType>
-        <rasd:VirtualQuantity>1024</rasd:VirtualQuantity>
-      </Item>
-      <Item>
-        <rasd:Address>0</rasd:Address>
-        <rasd:Description>SCSI Controller</rasd:Description>
-        <rasd:ElementName>SCSI Controller 0</rasd:ElementName>
-        <rasd:InstanceID>3</rasd:InstanceID>
-        <rasd:ResourceSubType>VirtualSCSI</rasd:ResourceSubType>
-        <rasd:ResourceType>6</rasd:ResourceType>
-      </Item>
-      <Item>
-        <rasd:Address>1</rasd:Address>
-        <rasd:Description>IDE Controller</rasd:Description>
-        <rasd:ElementName>VirtualIDEController 1</rasd:ElementName>
-        <rasd:InstanceID>4</rasd:InstanceID>
-        <rasd:ResourceType>5</rasd:ResourceType>
-      </Item>
-      <Item>
-        <rasd:Address>0</rasd:Address>
-        <rasd:Description>IDE Controller</rasd:Description>
-        <rasd:ElementName>VirtualIDEController 0</rasd:ElementName>
-        <rasd:InstanceID>5</rasd:InstanceID>
-        <rasd:ResourceType>5</rasd:ResourceType>
-      </Item>
-      <Item ovf:required="false">
-        <rasd:AutomaticAllocation>false</rasd:AutomaticAllocation>
-        <rasd:ElementName>VirtualVideoCard</rasd:ElementName>
-        <rasd:InstanceID>6</rasd:InstanceID>
-        <rasd:ResourceType>24</rasd:ResourceType>
-        <vmw:Config ovf:required="false" vmw:key="enable3DSupport" vmw:value="false"/>
-        <vmw:Config ovf:required="false" vmw:key="use3dRenderer" vmw:value="automatic"/>
-        <vmw:Config ovf:required="false" vmw:key="useAutoDetect" vmw:value="false"/>
-        <vmw:Config ovf:required="false" vmw:key="videoRamSizeInKB" vmw:value="4096"/>
-      </Item>
-      <Item ovf:required="false">
-        <rasd:AutomaticAllocation>false</rasd:AutomaticAllocation>
-        <rasd:ElementName>VirtualVMCIDevice</rasd:ElementName>
-        <rasd:InstanceID>7</rasd:InstanceID>
-        <rasd:ResourceSubType>vmware.vmci</rasd:ResourceSubType>
-        <rasd:ResourceType>1</rasd:ResourceType>
-        <vmw:Config ovf:required="false" vmw:key="allowUnrestrictedCommunication" vmw:value="false"/>
-      </Item>
-      <Item>
-        <rasd:AddressOnParent>7</rasd:AddressOnParent>
-        <rasd:AutomaticAllocation>true</rasd:AutomaticAllocation>
-        <rasd:Connection>VM Network</rasd:Connection>
-        <rasd:Description>VMXNET3 ethernet adapter on &quot;VM Network&quot;</rasd:Description>
-        <rasd:ElementName>GigabitEthernet1</rasd:ElementName>
-        <rasd:InstanceID>11</rasd:InstanceID>
-        <rasd:ResourceSubType>VMXNET3</rasd:ResourceSubType>
-        <rasd:ResourceType>10</rasd:ResourceType>
-        <vmw:Config ovf:required="false" vmw:key="wakeOnLanEnabled" vmw:value="true"/>
-      </Item>
-      <vmw:Config ovf:required="false" vmw:key="cpuHotAddEnabled" vmw:value="false"/>
-      <vmw:Config ovf:required="false" vmw:key="cpuHotRemoveEnabled" vmw:value="false"/>
-      <vmw:Config ovf:required="false" vmw:key="firmware" vmw:value="bios"/>
-      <vmw:Config ovf:required="false" vmw:key="virtualICH7MPresent" vmw:value="false"/>
-      <vmw:Config ovf:required="false" vmw:key="virtualSMCPresent" vmw:value="false"/>
-      <vmw:Config ovf:required="false" vmw:key="memoryHotAddEnabled" vmw:value="false"/>
-      <vmw:Config ovf:required="false" vmw:key="nestedHVEnabled" vmw:value="false"/>
-      <vmw:Config ovf:required="false" vmw:key="powerOpInfo.powerOffType" vmw:value="preset"/>
-      <vmw:Config ovf:required="false" vmw:key="powerOpInfo.resetType" vmw:value="preset"/>
-      <vmw:Config ovf:required="false" vmw:key="powerOpInfo.standbyAction" vmw:value="checkpoint"/>
-      <vmw:Config ovf:required="false" vmw:key="powerOpInfo.suspendType" vmw:value="preset"/>
-      <vmw:Config ovf:required="false" vmw:key="tools.afterPowerOn" vmw:value="true"/>
-      <vmw:Config ovf:required="false" vmw:key="tools.afterResume" vmw:value="true"/>
-      <vmw:Config ovf:required="false" vmw:key="tools.beforeGuestShutdown" vmw:value="true"/>
-      <vmw:Config ovf:required="false" vmw:key="tools.beforeGuestStandby" vmw:value="true"/>
-      <vmw:Config ovf:required="false" vmw:key="tools.syncTimeWithHost" vmw:value="false"/>
-      <vmw:Config ovf:required="false" vmw:key="tools.toolsUpgradePolicy" vmw:value="manual"/>
-    </VirtualHardwareSection>
-  </VirtualSystem>
-</Envelope>