diff --git a/provingground/mod_test_image_for_staging.sh b/provingground/mod_test_image_for_staging.sh
deleted file mode 100755
index a7b1605..0000000
--- a/provingground/mod_test_image_for_staging.sh
+++ /dev/null
@@ -1,96 +0,0 @@
-#!/bin/bash
-
-# Copyright (c) 2013 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.
-
-# Description:
-# Script modifies a chromiumos image so that it will work with test
-# instances of the DM Server and GAIA in the staging environment.
-#
-# When run, the script will mount the specified image, make modifications to
-# the flags passed to Chrome, and then re-sign the image with devkey.
-#
-
-. "/usr/lib/crosutils/common.sh" || { echo "Unable to load common.sh"; exit 1; }
-
-assert_inside_chroot
-
-DEFINE_string dmserver \
-  "https://cros-dev.sandbox.google.com/devicemanagement/data/api" \
-  "Complete URL for the DM Server" d
-DEFINE_string gaiaserver "https://gaiastaging.corp.google.com" \
-  "Complete URL for the GAIA server" g
-DEFINE_string image "$FLAGS_image" \
-  "Path and name of the chromiumos image file" i
-
-# Parse command line.
-FLAGS "$@" || exit 1
-eval set -- "$FLAGS_ARGV"
-
-set -e
-
-FLAGS_image=$(eval readlink -f "${FLAGS_image}")
-IMAGE_DIR=$(dirname "${FLAGS_image}")
-IMAGE_NAME=$(basename "${FLAGS_image}")
-ROOT_FS_DIR="${IMAGE_DIR}/rootfs"
-CONFIG_FILE="${ROOT_FS_DIR}/etc/chrome_dev.conf"
-DEVKEYS_DIR="/usr/share/vboot/devkeys"
-VBOOT_DIR="${CHROOT_TRUNK_DIR}/src/platform/vboot_reference/scripts/"\
-"image_signing"
-
-cleanUp() {
-  "${SCRIPTS_DIR}/mount_gpt_image.sh" -u -r "$ROOT_FS_DIR"
-}
-
-# Writes stdin to the given file name as root using sudo in append mode.
-#
-# $1 - The output file name.
-sudo_append() {
-  sudo tee -a "$1" >/dev/null
-}
-
-if [ ! -d "$VBOOT_DIR" ]; then
-  die "The required path: $VBOOT_DIR does not exist. This directory needs"\
-      "to be sync'd into your chroot.\n $ cros_workon start vboot_reference"
-fi
-
-trap cleanUp EXIT
-
-# Mount gpt (GUID partition table) image, and sets up var, /usr/local,
-# and symlinks.
-"$SCRIPTS_DIR/mount_gpt_image.sh" --image="$IMAGE_NAME" --from="$IMAGE_DIR" \
-  --rootfs_mountpt="$ROOT_FS_DIR"
-
-# Instruct session_manager to make some changes to Chrome's command line.
-sudo_append "${CONFIG_FILE}" <<EOF
-################################################################################
-# mod_test_image_for_staging.sh modifications start here.
-
-# Delete the flag with the old URL and set a new one.
-!--device-management-url=
---device-management-url=${FLAGS_dmserver}
-
---gaia-url=${FLAGS_gaiaserver}
---lso-url=https://test-sandbox.auth.corp.google.com
---google-apis-host=www-googleapis-test.sandbox.google.com
---oauth2-client-id=236834563817.apps.googleusercontent.com
---oauth2-client-secret=RsKv5AwFKSzNgE0yjnurkPVI
---cloud-print-url=https://cloudprint-nightly-ps.sandbox.google.com/cloudprint
---ignore-urlfetcher-cert-requests
-
-# mod_test_image_for_staging.sh modifications end here.
-################################################################################
-EOF
-
-trap - EXIT
-
-cleanUp
-
-TMP_BIN_PATH="${FLAGS_image}.new"
-"${VBOOT_DIR}/sign_official_build.sh" usb "${FLAGS_image}" \
-                                     "${DEVKEYS_DIR}" \
-                                     "${TMP_BIN_PATH}"
-
-echo "Renaming from ${TMP_BIN_PATH} to ${FLAGS_image}."
-mv "${TMP_BIN_PATH}" "${FLAGS_image}"