Remove obsolete files.

mod_for_test_scripts/000recordRootFsSize

-#!/bin/bash
-
-# Copyright (c) 2009 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.
-#
-# Record the original size of the image without modifications from
-# cros_mod_image_for_test.sh, for reporting and monitoring through autotest.
-
-# Record the size, but don't overwrite the file as its existence indicates
-# that this image is not a production image.
-echo "Recording production image size."
-FILE="${ROOT_FS_DIR}/root/bytes-rootfs-prod"
-if [[ ! -f "${FILE}"  ]]; then
-  # This will complain it cannot find a valid mtab so keep it quiet.
-  # Grep for rootfs mount at end of line otherwise we will get rootfs/var
-  # mount point as well.
-  df -B1 -P 2>/dev/null | grep "${ROOT_FS_DIR}$" | awk '{ print $3 }' > \
-      "${FILE}"
-else
-  echo "  Not modifying existing ${FILE}."
-fi