kernel_menuconfig: Drop unused script

No one is known to be using this script, and it no longer works.
If it turns out to have users, the script will need to be updated
to work with the current config file format before re-adding it.

kernel_menuconfig

@@ -1,85 +0,0 @@
-#!/bin/bash
-
-# Copyright (c) 2015 The CoreOS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-SCRIPT_ROOT=$(dirname "$(readlink -f "$0")")
-. "${SCRIPT_ROOT}/common.sh" || exit 1
-
-# Script must run inside the chroot
-assert_inside_chroot
-
-assert_not_root_user
-
-# Flags
-DEFINE_string board "${DEFAULT_BOARD}" \
-  "Board to use for kernel source and architecture."
-DEFINE_string overlay "coreos" \
-  "Portage repo containing the kernel ebuild."
-DEFINE_string package "sys-kernel/coreos-modules" \
-  "Portage ebuild name for the kernel."
-
-# Parse command line
-FLAGS "$@" || exit 1
-eval set -- "${FLAGS_ARGV}"
-
-# Die on any errors.
-switch_to_strict_mode
-
-if [[ -z "${FLAGS_board}" ]] ; then
-  die_notrace "--board is required."
-fi
-
-. "${BUILD_LIBRARY_DIR}/toolchain_util.sh"
-. "${BUILD_LIBRARY_DIR}/board_options.sh"
-
-KERNEL_ARCH=$(get_kernel_arch "${CHOST}")
-KERNEL_CLFAGS="-nopie -fstack-check=no"
-KERNEL_SRC="${BOARD_ROOT}/usr/src/linux"
-if [[ ! -f "${KERNEL_SRC}/Makefile" ]]; then
-  die_notrace "No kernel source found at ${KERNEL_SRC}"
-fi
-
-KERNEL_BUILD=$(mktemp -d)
-trap "rm -rf '${KERNEL_BUILD}'" EXIT
-
-# Set up a ccache friendly build tree
-mkdir -p "${KERNEL_BUILD}/build"
-ln -s "${KERNEL_SRC}"/* "${KERNEL_BUILD}"
-
-if [[ -d /usr/lib/ccache/bin ]]; then
-  export PATH="/usr/lib/ccache/bin:${PATH}"
-  export CCACHE_BASEDIR="${KERNEL_BUILD}"
-fi
-
-kmake() {
-  make -C "${KERNEL_BUILD}" \
-    ARCH="${KERNEL_ARCH}" \
-    CROSS_COMPILE="${CHOST}-" \
-    KBUILD_OUTPUT="build" \
-    KCFLAGS="${KERNEL_CFLAGS}" \
-    LDFLAGS="" \
-    "$@"
-}
-
-kmake_var() {
-  echo -e "e:\\n\\t@echo \$(${1})\\ninclude Makefile" | kmake -s -f -
-}
-
-KERNEL_MAJOR=$(kmake_var VERSION)
-KERNEL_MINOR=$(kmake_var PATCHLEVEL)
-
-OVERLAY=$(portageq get_repo_path / "${FLAGS_overlay}")
-FILESDIR="${OVERLAY}/${FLAGS_package}/files"
-DEFCONFIG_NAME="${ARCH}_defconfig-${KERNEL_MAJOR}.${KERNEL_MINOR}"
-DEFCONFIG_PATH="${FILESDIR}/${DEFCONFIG_NAME}"
-COMMONCONFIG_NAME="commonconfig-${KERNEL_MAJOR}.${KERNEL_MINOR}"
-COMMONCONFIG_PATH="${FILESDIR}/${COMMONCONFIG_NAME}"
-
-cat "${DEFCONFIG_PATH}" "${COMMONCONFIG_PATH}" > "${KERNEL_BUILD}/build/.config"
-kmake olddefconfig
-cp "${KERNEL_BUILD}/build/.config" "${KERNEL_BUILD}/build/.config.bak"
-kmake menuconfig
-kmake savedefconfig
-diff -u "${KERNEL_BUILD}/build/.config.bak" "${KERNEL_BUILD}/build/.config" || true