cros_workon: remove this file

cros_workon

-#!/bin/bash
-
-# Copyright (c) 2010 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.
-
-# This script moves ebuilds between 'stable' and 'live' states.
-# By default 'stable' ebuilds point at and build from source at the
-# last known good commit. Moving an ebuild to 'live' (via cros_workon start)
-# is intended to support development. The current source tip is fetched,
-# source modified and built using the unstable 'live' (9999) ebuild.
-
-# --- BEGIN COMMON.SH BOILERPLATE ---
-# Load common CrOS utilities.  Inside the chroot this file is installed in
-# /usr/lib/crosutils.  Outside the chroot we find it relative to the script's
-# location.
-find_common_sh() {
-  local common_paths=(/usr/lib/crosutils $(dirname "$(readlink -f "$0")"))
-  local path
-
-  SCRIPT_ROOT=
-  for path in "${common_paths[@]}"; do
-    if [ -r "${path}/common.sh" ]; then
-      SCRIPT_ROOT=${path}
-      break
-    fi
-  done
-}
-
-find_common_sh
-. "${SCRIPT_ROOT}/common.sh" || (echo "Unable to load common.sh" && exit 1)
-# --- END COMMON.SH BOILERPLATE ---
-
-die "error: Please run cros_workon from chroot:/usr/bin/cros_workon"